Horrible service from Discovery Vitality

I am very unsatisfied with the level on handling of my vitality account, as I have had to make numerous calls when it comes to this account and still when I have finally given up on it I am getting double debited again, on my last interaction I was told to pay R718 and that should put the account on track that was the 27th of September, that would also cover the upcoming month which was October, I got a cancelation letter after having paid that amount and I emailed with regards to that, and no one responded, on the 30th of October again I asked for feedback if my account is active or not and still no response, but on the 1st of November my bank account was debited for an amount of R1077 and this was also not the bank account we had agreed on, I concluded to cancel my membership, as it seems futile to keep having to call in with regards to correct debit amounts and banking details, now yesterday again my account is being debited an amount of R718 which I do not understand as the lady I spoke to said it was cancelled on the 4th of November and nothing about debiting my account was communicated with me, as you were already over charging me and on the incorrect account number, I even got an email from planet fitness that you had sent the instruction to cancel my benefit on the 4th of November, but now you choose to debit my account, please refund my money as it is futile to communicate with you guys. I even changed to discovery bank for you to debit my account but you failed to debit and now yesterday when I have canceled, you choose to double debit me.

Can I please get a refund for the money you debited yesterday as I honestly have tried to work with you guys with regards to this account but I feel the handling of it has been dismal.