Welcome to the community!
Are you still currently a Fido customer? That is, had you cancelled your services with Fido? From what I understand, you had made an overpayment on your account, but you are still a Fido customer.
If you had cancelled your Fido services and had the negative balance on your bill, Fido will mail the refund to the address on file, as mentioned above.
On the other hand, if you are still a Fido customer with the negative balance on your bill, that amount would usually stay on your account and be used towards future payments. You would need to contact customer service if you wished to have that amount refunded. Alternatively, you might consider sending @FidoSolutions a PM. Once they verify some information, they'll also be able to access your account.
Hope this helps 😀
Welcome to the Fido community!
Fido will send you a refund by cheque to the address on file, it usually takes about 3 weeks but can take as long as 6 weeks from the date your final invoice was produced.
If your address on file has changed then you will need to contact Fido and they can send the cheque to the new address.