Complaint Review: Comcast

I was told I would be a charged a $100 unreturned equipment fee upon cancelling my service with Comcast.  The fee is for a cable box that I received as a part of my internet package. By the time I found out about this, I had moved out of my sublet. and my landlord had thrown out the box. When I was given the box by an Xfinity employee, I was not told in any way that I had to return it or that there was a fee associated with it. In fact, I did not even need the box, as I did not have a tv inside my sublet. I have called customer services a few times to try to get the fee waived, but they were very dismissive and told me that nothing could be done about it. I would be okay with the fee if it had been verbally clear to be that the cable box was rental equipment and had to be returned, but since I wasn't, I feel incredibly scammed and disrespected as a customer.