Cell C suspended my account due the their own error.

I recently changed bank accounts (the bank did the switch for me) and my Cell C debit order did not go off this month. I was called on 1/3/2023 by Cell C to advise me of this. I asked the guy calling to please send me an email to confirm my bank details so that I could make sure the ones they have on system were correct. I said once this is done a debit order can be arranged. The email did not arrive. I then called Cell C back on 3/3/2023 and was advised it was a system error on their side and that someone would investigate and get back to me. The never happened. The yesterday I got a call from Cell C again telling me that my debit did not go through. I explained to her about the above and again asked for an email to confirm my bank details so that I could ensure the correct ones were on system and a debit order could be arranged. She said she would send me an email. This did not arrive. Today my cell account has been suspended and I cannot make any calls- including to Cell C to sort this out. I am furious. They have not done anything to assist me on their side, and I have not refused to pay- only asked for confirmation of the details they have on system to be sent to me so that I can ensure that all payments are made correctly in the future. Please unsuspend my account immediately, call me, confirm my bank details via email and once done arrange a debit order for my cell account.