Worst Costumer Service

Hello, my name is [Edited: "Personal Information"].

I have had the worst Costumer Service experience with Xfinity.

My husband bought a phone because his died, we canceled our services, we returned two phones and never received a box or label to return the phone we bought.

Now Xfinity says we owe them  because we didn't return the phone.

I have been trying to return the phone all day yesterday and today. 

I called costumer service and they told me to go to a store (they would print a label for us) because we got the phone at a store they couldn't do anything. 

I went to the store and they told me they couldn't print anything. 

I am done trying. 

Help me return the phone and give me a full refund.