Suspended within the first 2 weeks of taking out a new contract

Took out a contract on 17/11/2022 my debit order date is 15th of each month, my first debit order is supposed to be on 15/12/2022 today 04/12/2022 I received an invoice stating amount due must be paid ON or BEFORE 31/12/2022 BUT MY SIM CARDS HAVE BEEN SUSPENDED SINCE FRIDAY 02/12/2022... WOW TELKOM YOUR CUSTOMER SERVICE IS A NIGHTMARE... HOW DO YOU SUSPEND MY SIM EVEN BEFORE AN INVOICE IS OUT & TO TOP IT OF HOW DO YOU SUSPEND A SIM WHEN THE DUE DATE IS NOT PAST YET???