Debit Order Rejection fee of R290

I have a complaint with Telkom service delivery, on the 1st of July I went to do sim swap, as I had lost my Telkom Contract sim - at Southgate mall. The lady never explained anything to me i.e as to when I should insert the new sim on my phone and on my contract sim I pay an amount of R89 and get 1 G of data. When inserting the sim it never worked then decided to go to Eastgate mall to do sim swap and they told me that the sim swap done first time was unsuccessful. Then gave me another sim and told me that they will contact me cause my sim was suspended and I never received a call notifying me of my sim. End of July I skipped the payment as my sim was not working and also didn't get my 1 G of data as per contract agreement. Since July until now (October) I'm not getting my data and when I received my statement an amount of R378.94 was expected end of September. I was not made aware of the expected payment until now when I phoned Telkom to report my statement.