Instrument Cluster Store Instrumentclusterstore.com Scammed - returned part and they kept my money Wellsboro Nationwide

The owner texted me to tell me 'You are retarded". I received this text after asking again for my refund. Originally, I ordered an instrument cluster for my car that did not fit. This seller suggested I ordered the wrong part and I responded with well MAYBE I did but it said it was the right one in the ad. The seller then insisted I ordered the wrong part. I live in a rural part of the country in the mountains with little resources. I called and informed seller that I did not have access to internet or printer to print label at that time and could not return the item through eBay. The seller then gave me instructions on how to send the package. The seller said to write the RMA# on the box and gave me the address to mail the package back and I did so. The seller informed eBay the item was never returned or received. I mailed the package on 4/18/16 for $16.65. I have the transaction listed on my bank account record. Unfortunately, I lost the tracking number and upon informing the seller of this event they later proceeded to report to eBay that I never sent it and they never received it. On 5/19/2016 in the sellers BBB response he states, we still PROMPTLY authorized their return request AND paid for a return shipping label through the return request he opened. This is not true, they denied my return. In his response to my BBB complaint dated 5/29/2016, the seller states Eventually, we did receive this customer's return. The seller then states, we had no choice but to write Return To Sender on it and send it back to the buyer. To this day, I have not received the item and have confirmed this with my local USPS office. The item was never returned to me. I have tried to work this out with this company several times only to be called insulting names and then hung up on.