I need help with a problem! Here is the story thus far...

Last year I made the decision to buy a big adult ball python rack, so I would be able to expand my collection. After some research I decided to buy from Freedom Breeder. I shelled out about $1,500 for what I thought was the best I could buy for my snakes. I got it in April 2013. It arrived with no shortage of damaged pieces. The heat panels were bent up and it took quite a while to get them to sit flat. Two of the racks ten levels were broken and wouldn't fit in place, and they didn't ship me the wheels and base I ordered either. I spent the next few weeks emailing them, sending pictures of the broken parts, trying to get replacements with no reply. I finally emailed them saying I wanted my money back. They ignored that, and the next week replacement parts arrived at my door. These too were broken and would not fit in place. I called and emailed but got no reply. I decided to contact my bank to get my money back. My bank filed a claim. After a month we got our money back, and we asked the bank what to do with the rack. The claims specialist wasn't able to get a hold of anyone at freedom breeder, so we were left with this giant rack we didn't need (I bought a better replacement rack from Vision.) Fast forward to several months later...I get a call from freedom breeder demanding their rack back. They said they were entitled to it after the bank took our payment back. Fair enough in my mind although they did refuse to repay me the shipping costs that I paid ($400). I tried to schedule a pickup date with them. I called weekly to try to organize a pickup, but to no avail. They finally had a date to come get it, but I was busy that weekend and wouldn't be home. I told them to call to reschedule, and that was over 5 months ago. I finally decided to call in October 2013. I managed to get someone on the phone, but when I brought up the situation he replied, " I thought that was dealt with." I haven't heard from them since.

Can I just sell the rack and get my cost of shipping back? I hate having this huge useless rack here. It's not my responsibility to store it for them. They clearly don't care about it. It's been so long! The fact they just abandoned it with me means they've forfeit any ownership over it, right? I don't want to keep giving them opportunities. Their terrible service doesn't deserve to force me to do their jobs for them. What should I do? Can I just dump it? I would like to get my shipping cost back too. What do you think?