Very unhappy client

I agree to a contract offer with blue label and all went well in the beginning. In March 2022 i got an offer of payhalf the amount i payed monthly which was R199. 50. My contract was to expire in October 2023. I then recieved a call that i have an outstanding amount of R2500. I agreed to paying it off by paying R325 a month. I was over debited in December and they took R849. 50 i was told to email my statement and copy of ID which i did and i still get calls of money i owe. In January only an amount of R1174.50 was debited from my account. How does a company activate so many debit orders that add up to so much from a customer's account? This company is a **** that *****s people's money. All they do is make empty promises an just take and take and take