Cancelled my shaw account because we were offered a much better deal by a competitor. After calling me 8+ times trying to get me to stay with them I said no. My account has always had automatic billing enabled. I sent the modem back via CanadaPost and received confirmations both from CanadaPost and Shaw saying the equipment had been returned on October 6th 2021. No contact from Shaw, up until I receive a letter in the mail from a COLLECTIONS AGENCY saying I have an owing balance as of October 27th 2021 where it mentions unreturned equipment and unpaid bills which is complete BS as I have returned the equipment AND my bills were automatically withdrawn. 

Does anyone know how to resolve this as I am concerned and upset about the prospect of my credit being affected because Shaw is offended that I switched carriers?!