Unauthorised deduction

I am struggling to cancel a contract that finished in Jan 23. I had already made four attempts to cancel every time I call I am sent pillar to post. I was paying R1307 for two contracts, the R185 finished in Jan 23. I instead of deducting the R185 from R1307 now this month it went up by R108 and I am expected to pay R1415 on the 15 Feb 23. No one can explain what is happening. Please help I just want all that monies to be reversed back into my account.