Anti age Resveratrol I returned their bottles and they only give me credit for one bottle. Gresham, Oregon

I ordered these pills in June on a special for $.99 on a free trial. They sent me a bottle of pills and charged me $87.13. They sent me another bottle two weeks later and charged me another $87.13. I called and talked to someone who told me to send back the merchandise if I was not happy and be sure to include the RNA number. I sent the bottles back and they credited my account for one bottle. They refuse to do anymore saying I didn't return the bottles "properly". Yet, they were able to give me credit for the one bottle. I have called repeatedly and get the same response. These are very professional slime balls.