RCS continually adding charges to my account after paid account in full in February

Been battling with RCS since February when I paid my account in full. Thereafter I received a statement billing me for R69 when asking about it i got asked for my ID number, my account was then debited and i informed them of this and received no response, i then received another statement for the next month this time R77 I mailed them and then was told i need to request a settlement letter, i requested one and got no response and then got debited for the second amount, i then reversed both amounts and lo and behold i got a call today saying i owe R146 and asking when I will settle it. apparently my situation has been escalated but it seems when its posted here its get responded to sooner.

Please note I had a Galaxy account, Dion Wired Account , Cape Union Account all under RCS and when the R69 appeared on my statement it was immediately cleared by someone named Jamie and no settlement request from my side was needed.

My timeline was as follows: 12 Feb paid account in full 16 Mar Received Statement for R69 16 Mar Mailed RCS Team to query R69 24 Mar Was asked for ID Number 24 Mar Provided ID Number 3 Apr Account was Debited, reached out to query 16 Apr Received Statement for R77 16 Apr Mailed RCS Team to query R77 23 Apr Responded I need a settlement letter asked if i want one 23 Apr Responded I would like letter 29 Apr Asked for update 4 May Account Debited for R77 4 May wrote in asking about Debit and informing RCS Team both amounts were reversed 7 May received call from RCS saying I have outstanding amount asking when I will make payment

R100 is nothing to me but I refuse to pay this because of bad customer service and response time. I work in Customer Service Sector so I am very aware of response Time and FIFO which was not followed in this case.