Hello Jusnoorkaur0302,
Welcome to the community!
Sorry to hear of your situation. However, you should note these forums are community-driven and not intended as a venue for customer services. We do not have access to customers' accounts nor would we know the details of your particular situation.
Have you had a chance to view the detailed billing? You should be able view those details via your My Account --> View & Manage Bill. From there, you should be able to Save and/or Print a PDF copy of your bill. Alternatively, you should also be able to access those call details by clicking on Usage summary. It should list the source of the charges.
If your Fido SIM was active while abroad, it's possible usage while outside of Canada triggered Fido Roam charges. In addition, if there is an overdue amount, it's possible that your line incurred a Suspension fee and/or Returned Payment Charge (see here).
If you would like to discuss your bill, you would need to call customer service. Unfortunately, they do not offer customer service via email as it is generally not considered a secure method of communication. With their new system, you may be required to arrange a call-back from them.
Hope this helps 😀
Cheers
