Telkom is ripping me off

I opened 6 to 8 enquiries and with each one I would just receive a sms with a reference number and a message that says something like case close issue resolved with lack of details. My initial contract agreement with Telkom was R199 per month on a 24 month basis. However last year there was a VAT change which affected my monthly payment to being R203 per month. Then somehow in September last year it came back as R568.50 as of October 1 2018, they said I had purchased 10 gig worth of data or upgraded my contract which I didn’t and was not the case, and that 10 gig was added into my monthly debit order. Then in October after the initial enquiries the statement came in with an amount of R312.26 which still was wrong as it is not what I agreed on. Then the following month of November the statement came with an amount of R501.54 which I reversed as I pointed out that I’m not going to pay an amount I did not sign up for, also that amount was due to their system having problems, as at a later stage one of the call centre agent mentioned that it may be due to the system upgrade hence the probability of being charged what I am being charged, also In one of the enquiries in late 2018 I asked them if I am being de*****ed as I never signed up for an additional item in my contract they never got back to me with any information. I kept on reversing the debit orders since. 2019 As of January 1 2019 another statement came in with an amount of R1779.01 and it came in while there were still cases pending with regards to me being over billed. February As of march 1st 2019 another statement came in with a fee of R2.186.39 and this time they said the reason the amount have being increasing in such a rate it that reversal fee are my Liability and not theirs which doesn’t make sense while I have case I don’t know the outcomes of with Telkom. Now at this point I paid half the amount when they did a debit order within a week or 2 of that month and I told (specifically) them to do the other half on the 25th when I get paid. However they did not do a debit order they only attempt of a debit order happened after 15 – 20 days when I didn’t have enough funds on my account.

Then today which is the 17th of April 2019 they send me an sms which reads: “mr mothsudi, Avoid being Listed as a slow payer on your Telkom Mobi contract ***** arrears R1525.49 …” And the previous day when their debit order bounced I send them a message asking them why a late debit and they should call me back no one contacted me.