Incorrect debit, no refund, useless service

Signed up with the Hillcrest Virgin Active. Was told it would be easy to upgrade my contract if i wanted to join the Moses Mabhida Gym. It's been an absolute nightmare. No it's not an upgrade. I had to sign another contract. I was told by the Hillcrest branch it will be R1300. On the day of trying to upgrade, the price is now R 1710 because you actually have to pay more if you're on momentum. Absolutely ridiculous. I told Tristan at Virgin Active Moses Mabhida that I won't upgrade if it's that expensive. I agreed to R1300 not R1710. He said he will speak to management and keep it at R 1300. Needless to say the debit order came off for R1710. I've been back and forth with him trying to get it corrected. Now it's on the second month and my account has once again been debited with R 1710. I can't get a refund from them and he keeps saying he is going to sort it out but he doesn't.