Refund claim and poor service

I have been waiting for a refund since December. I made a double payment when closing my account. These guys keep adding the waiting period. Its been 3 months already waiting for my refund. This has just been the worst company I have ever had to deal with. I have been patient with them and looks like it will take them a year to refund my money. I have called many times and tried to have this sorted out with them. Its just the worst company you can ever deal with. Everything is slow. Its just the worst.