VODACOM, THE *******!!!

I have a contract with Vodacom that had been debting R212 since I took it up last year, I made sure to put a limit look on as I merely took it up to improve my credit score. 25/05/2021 they debited R1014, when I called in they told me that it was because the limit lock was removed, QUESTION IS BY WHO AS I NEVER DID. This month my account will debit R2845, from R212 to almost R3000! I've tried contacting their complaints department but NOTHING. How am I suppose to get to my other expenses if I'm supposed to pay R2800 for something that I'm unaware of?!