Terrible service from Jet Rcs group

I had a terrible treatment from jet rcs group when I want to close my account. Apparently I paid more into my account and they can't close it while it has credit. I asked them to refund and send them all bank statement for proof of payment and that was the past 3 months and currently still waiting. Lately they ignore my emails and what upset me the most is, they keep deducting R30 monthly from the credit in my account for admin and yet they refusing to refund and close the account.