Debit orders that are not supposed to have been made.

I am really, really baffled by Cellc. Really, I don't know whether they are vindictive, etc. At some stage in my life, I had financial problems and ended up with debit orders that didn't go through. I made several calls to them from February till now, the beginning of March. In the interim, what they had done was not to give me the benefits until I am up to date with my monthly payments. I understood. I was unable to write SMS to anyone and other activities that I would have normally done. I couldn't make calls or receive calls. What I could do only was what's up, messages and Gmail. On the 25th of February 2023 Cellc debited my bank account with a sum of R150.00. On the 28th of February 2023 they debited an amount of R 986.97 and on the 3rd of March they debited another amount of R358.99. All this debited orders amounted to R1495.96. I called them and they explained that those amounts were correct because they had to cover the backlog which started when there were insufficient funds in my bank account. Okay I was happy with that. I then asked them to start debiting my account with a sum of R248.98 ( which is my monthly payment on the 26th of March. They called me and agreed that I am now upto date with my payments and they will only Debit my account with an amount of R248.98 on the 26th of March. To my surprise this morning as I checked my bank account I noticed that yesterday they debited my account, however unfortunately I had insufficient funds in my bank account. My question to them is what was the debit order for? As per our discussion they are to start debiting my account on the 26th of this month, the amount should be my normal installment of R248.98. CAN CELLC PLEASE TELL ME WHAT'S GOING ON I AM REALLY REALLY CONFUSEF, ARE THEY NOW GOING TO BLOCK MY BENEFITS AGAIN ????