Ineffective debit system

MTN has, for the 3rd time, failed to debit despite having called the “so called Boza” network 3 times asking them to debit, yesterday 18-01-2021 2:30 pm, I called and after 20min waiting for the agent to pick up, I managed to get hold of one, who, like the other 3, promised that she has loaded the debit request, right now I see that no debit took place and they blocked the Sim Card. I regret opening this contract.