Billing

i took a 3rd contract in Feb 2017 that consist of 2 routers, instruction was for them to debit a different account for the last contract, 1st month that never happened and i didnt have a problem with that, 2nd month they debited a wrong account again, went to Telkom in Claremont in Stadium on Main, they said they will resolve the matter, fine 3rd month they debited they correct amount and 4th the same, but for some reason they decided not to debit the account and they date that they are debiting is no as per the signed contract, contract stipulates 20th of each and every month but they decided to debit the 5th,been to telkom numerous occasions and phoned call centre and no body seems to give a damn about my problem that was created by you guys, if i do not get any response i am taking this to ombudsman. im sick and tired of each and everytime i open my phone i get an sms telling me that i must make payment.