Hello Rohit_singh,
Welcome to the community!
Since your bill has already been generated, you will need to pay for the entire bill. You should note that bill was likely generated because switching providers would have automatically cancelled your Fido line. Any proration, if applicable, would have already been calculated in the generation of that bill. Since your Fido line was cancelled before your second month, any future credits would not be applicable on that bill. You should be able to view the billing details of that bill via My Account.
Hope this helps 😀
Cheers
