Wrong invoice

Telkom made a mistake on my account and invoiced me wrong and stopped my line from working for 8 days because the amount was beyond my spend limit. I called them many times and finally someone called and said they made a mistake and they have resolved the issue. They told me to make a payment manually they won’t debit my account, okay I agreed. This morning I wake up and an amount of R17000 is debited on my account, reference Telkom. I call and ask they tell me they are not able to help me now I have to wait for 72 hours for someone to check what happened and I have other bills to pay I have kids to provide for. Telkom I’m so disappointed and fed up with your mistakes and making it my problem.