No service at all

Ever since I took up a contract with telkom, they have never debited my account. I have made numerous phone calls to them querying and complaining about it. They promised to get back to me as the fault is with their back office. I never received any feedback from them,now they just debited an amount of over R2000. I regret ever taking a contract with them. Now I ha e scored myself a bad name at credit bureau,all tx to telkom.