HUGE Data Use Discrepancy

[FB713]

Just got off the phone with Fido. I called to report issues with using my Mobile Data, which had been affecting my device for the past 8 days, preventing me from using it at all. At first, the rep confirmed that everything on my account looked normal and tried to walk me through some basic troubleshooting. For some reason, certain parts of the "Connections" page on my Samsung phone were greyed out and inaccessible, including the toggle for Mobile Data and the APN details. The Rep told me that she would check with Tech Support, but stated that she had already helped me more than she should have and that Fido doesn't do technical support on devices anymore - which itself was baffling, but that's besides the point.

According to my device, my total data usage since the start of my billing cycle was 790 MB, which makes sense, since I only use Youtube and X on my lunch break at work. Wifi usage showed 6.6 GB for the month, since I tend to stick to Wifi for most things, and to my Laptop for the vast majority of my internet usage. Rep put me on hold to check with Tech Support on what to do. When she got back, she informed me that I had hit my data limit for the month and used 49.31 GB since 12 December.

WHAT?! That is IMPOSSIBLE. I never use anywhere near that amount, and I have been accessing my data significantly less since I was home from work for several days this month and using exclusively Wifi during those times. Why would my phone claim that I only used 790 MB, but Fido claim that I used 49.31 GB, an amount so ludicrously large that I have never in even my most intense months of data usage ever even come close to a third of. When there was a major power outage a few years ago and I relied on Mobile Data, I maxed out at 10 GB - never 49 GB !!! The Rep told me that watching 30 minutes of Youtube could use up that much data, but that is nonsense. My usage this month has not been greater than previous months, in fact it's been significantly less, and I have Data Saver turned on so that apps can't use data while running in the background. I recognize that sometimes a small discrepancy might occur between the usage reported on my phone and that reported by my service provider, but from 790 MB to 49.31 GB ?  I have been ripped off or subjected to some insane system glitch or something, because there is no way that I used that amount. The Rep was not helpful and did not want to escalate when I requested to speak to a manager. She insisted that my only recourse was to buy more data. Why would I give more money for a problem occurring on your end? Rep could provide me no details on when this data usage occurred or what my usage was like in previous months. Is this just incompetence or is your system broken? 

UPDATE: I checked my previous bills and they track with my phone's data usage information for those periods, usually between 1.7 to 2 GB. When I told the Rep on the phone that my last month's usage was nowhere near 49 GB, she said, "actually you were using that much," which I now know to be a LIE. I don't know if someone is scamming me by hijacking my plan or if there's a system error or what, but I want my data back, because there is NO WAY that I used 49 GB from 12 December to 22 December, when I noticed that my data was disabled.

UPDATE 2: I just got off the phone with Samsung. They used remote tutoring to access my device and confirm that everything on the device, including the Data Usage tracker, is functioning as it should, and that all Data Usage would be displayed in the Connections section of my Settings. They told me that any claims to the contrary would be inaccurate, unless I used the data with another phone on my plan. Since this is the only device I have on a plan with Fido, unless someone is fraudulently using my data, then it is a system error. I want my data back. 

[FB713]

Called again and was told that I had not used 49.31 GB, that was the amount that I had remaining. Previous Rep was confused and got me all worked up because she misread the information. Turns out my data wasn't working because a parental block was accidentally placed on my account. Everything is working fine now.