Game and RCS - blatant intransparent ***** with poor response

I filled out an application for a Game card in 2013 - to purchase a laptop. I got the card – account number of the card: ********** ********** 24151 22 Jan 2014 – last purchase was made At that time R9185 Owed Every month my account was debited without my consent with no communication whatsoever. Statements to prove this from 2018 until now and was abroad during the time and they were by no means effective in stopping the recurring debit order. I had my bank stop this debit order and I found out that the amount that has been taken is now almost at R19000.00? There are numerous statements to prove this from then until 2018 now currently. As per all recorded calls, please forward me the document that was signed and bought to my attention as having been scratched out on the part where there was an agreement for an ongoing debit order for almost six years without my consent. They were able to retrieve this and were aware of the fact that the document had been tampered with! Since then they have been harassing me with calls up to four times a day asking for payment. They were at fault and have been messing me around with their poor customer service. I have emailed numerous times and would like them to reimburse me for their blatant intransparent *****. Legal action would be the next step I hope nobody else has experienced this and that this gets investigated further.