Incorrect billing

Charging you more than they supposed to Had a year membership however When the period ended, they kept charging me yet I stopped going and called them to cancel the membership they did not cancel, because I was billed I went back to the gym. They are always charging me the incorrect debit order amount and it is always to their benefit. They said I am using facility in Krugersdorp and Roodepoort which is incorrect I don’t even know where Roodepoort Gym is. Worse Scenario I called them on the 15th December where I was debited R1400 and the consultant escalated the matter and said it will be resolved in 72 hours Why do they always do this? Boom earlier this month they debited R3000 Do they think people won’t notice and get away with it? Every month.