Ridiculous Service

My Data Contract cost me R262 a month deducted on the 1st of every month. I missed my payment on 1 May. They then deducted R534 (double) on 1 June. Therefore my account should be up to date and my next payment would be R262 again on 1 July. Cell C decided to deduct R512 which I subsequently reversed as this was the incorrect amount. I called them twice and both times was cut off half way through explaining my situation. I then called them again on 20.07.2023 and the gentlemen advised that my account is up to date. I explained that it couldnt be, as I had reversed the July payment (which was incorrect). He then said he would send me a statement which would show the amount due on 1 August. This showed me that R1191 was due ????????. He however assured me that ONLY R262 would be deducted as an arrangement. Looking at the statement, I see that the new amount I am being charged monthly (after my contract ended) is now R590 excl VAT. My monthly amount rose from R262 to R590. This is absolutely ridiculous and no-one at Cell C is able to explain to me what on earth is going on. Its as if they do not listen when I try and explain. I would now like to cancel the contract with immediate effect after paying what I owe for July.

I have also on more than three occasions, changed my personal details telephonically and on none of the occasions were my details changed (Email address as well as Home Address