Telkom mobile contract

Never been this disgusted with telkom mobile contract, I called in December 2018 for debit order to be changed, i even requested to pay upfront for the month to cover for the following month, the consultant at telkom store advice I rather keep money in my account as they will double debit, double debit was done as expected, now my Sim card is locked, I can not make any phone calls since the 1st of Jan 2019, I called contact center, no one is assisting me, to my shock I now owe telkom R3000 because the debits are not being allocated, how incoviniancing is their services, I am regreting using telkom mobile. I would not recommend it anyone.