Wrong debited amount and date

I was signed up for the gym during April, and i was told that i will be paying R360 because i have a medical aid, i instructed them to debit on the 20th May 2022. On my surprise i was debited on the 3rd of May 2022, i tried to compliant on their Facebook page but there was no assistance, i was told the head office will contact me even today I'm still waiting for the call. then on the 5th i decided to visit the one of the gym center, i was told that most of client that were signed up in April they were wrong debited, and i will get a refund. its been 2 weeks now, no action have been happening. I am very disspointed to Virgin active, how can we build a relationship with the company that don't put their client complain first? It was easy for them to debit my money on the wrong date and wrong amount. What is taking them so long to refund a mere R520. Virgin ACTIVE i want my money, you can cancel the contract. I am not happy!