Hello Cindy2LouWho,
Welcome to the community!
Sorry to hear of your situation. I understand it's frustrating and financially unexpected having to pay for a phone you might have lost. However, it is not unreasonable for company to expect full payment for that device. If you already have made a payment arrangement, then you are likely already in contact with Fido's credit operations department. They are the only ones who can determine any possible provisions.
You should note that this is the community forum and not customer service. Simply stating your intention here to cancel your services will not accomplish that task. You would need to contact customer service. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
You should also note that upon cancelling your services, you would be required to pay the balance of your devices -- even for the one you lost. Cancelling your services does not do away with your obligation to pay for those devices.
Unfortunately, if you choose to not pay what you owe, that balance will likely be sent to collections and affect your credit in the future. I understand it's a difficult time for many people. Perhaps there may be other sources of assistance available to you.
**edit** You might consider removing your phone number from your post as this is a public forum**
Hope this helps 😀
Cheers
