Returned equipment not refunded

I posted in Septemberish of 2019 that I returned 5 boxes to direct. They have on 3 occasions since then told me they have received them. They have since then kept trying to charge the $333.90 for the equipment charge. I have printed out chats that I’ve had with their employees that state that direct has received the equipment. I have gotten 2 calls from their collections company telling me to pay up. Last night was the most recent call. I now am being told that if I just pay $18.90 in tax they will wipe out the rest. I told them I have no tax to pay as I’ve had no service since September 2019. They wanted a payment last night, I said send me a paper bill, she said she didn’t know if she could because my account was cancelled. Really? At the end in desperation I said if the tax was legit I’d be happy to pay it to get this over with. I feel I should call my local news reporter to get this aired. This seems very underhanded by a company we paid so much money to for so long, including past telephone service. How can they expect loyalty in the future? Not sure this is over!