SADV what do I need to do really.

I am not quite sure how to even start with this again. To my surprise this morning I receive an sms “ SADV> We were unable to run your debit order on 1 July but please note that your debit order will now run on Friday, 2 July 2021. “ and a returned debit order with a charge of R110 for SADV debiting my account. Who is going to pay for these charges too?? I have requested for cancellation in May. Never mind that the line is still active with SADV and I can’t connect my new fibre I am still being Debited for July service. I received calls and everyone made sure that the line will be canceled and by the 1st of July I can connect my new service provider etc. I am so defeated and out of words of what i must do so that SADV cancels my month to month fibre which I haven’t been active for since 1 May 2021 and why is a debit order being run on a cancelled service. What do you guys want me to do honestly.