R637 incorr debit order!

I refer to my post on the 28 Apr. I have since received an sms stating that my incorrect charges were reversed. On the 30 Apr Telkom debited my account for the same incorrect charge of R637!!! The call centre even sent me proof that the R637 was reversed! Incompetency!!! I want my money back! Social media team promised to call me but no call received. I tried the hp@telkom email address, no response. Telkom is quick to take the customers money but when they need to return it they are nowhere to be found!