Telkom and not adhering to debit order requests

Telkom mobile is completely useless when it comes tp adhering to the debit order customers sign for. I requested my payment on the account to be debit order but this changes from month to month. The one month debit order goes off the next it doesn't, there are months where one makes payment manually and they still take the debit order. In the month of may i made payment on the 25th but used my old reference number being ********** ********** 45030 instead of ********** ********** 95030 and the money is sitting in my old account. I logged a query last week wednesday yo have the money transferred as i keep getting threatening emails about my account being handed over to the lawyers and till today this has not been done as promised on ref ********** 2. I made payment on sunday 9th and still i am recieving texts that my account is overdue yet i have made 2 payments towards this account.