Ridiculous Charges

My two contracts I had with telkom expired in February 2021 whereby I had to contact Telkom to cancel, in March I phoned in to cancel both contracts, which was done. On the 20th April an amount of R118.07 went off my account which didn't make sense in my mind cause my contracts are cancelled, I then instructed my Bank to reverse the payment then phoned to enquire what this amount was for. The agent then explained it was for the Data I received for March 2021, I then understood. On the 30 April 2021 the amount of 118.07 went off my banking account. So all was good, the on the 04 June 2021 I received a statement stating on the 30 June 2021 an amount of R292.20 will be debited from my account. I then phoned Telkom today asking what this is for, the first again explained to me that TELKOM charges R202.70 cause the debit order for R118.07 was reversed.. Me being in denial phoned back and spoke to another agent, and she told me the same thing, Are you people a Bank? Cause not even my Bank charges this amount for a rejected debit order, further more there is an amount of R89.50 on the statement that no one can tell me what's it for? I am absolutely not willing too pay R300 for a R118 debit order, I just cant get rid of you people... if needs be.. I will pay this amount over 6 months via EFT I don't want you people touching my banking account