Poor service

I signed for me and my 3 x kids, when my daughter tuned 18yrs during a migration to adult contract, things became a mess. She was billed twice for one contract, the other contract debited as per schedule and the other deemed to be in arrears. Logged a query with branch (Horizon View Village and Head Office) both couldn't resolve my query. Sheryl and Mbuso from Head Office attempted and failed sighting the contract to be a mess, the contract was successfully cancelled all contract, debit order went through which i reversed and now after 2 x months another debit went off. What for, i don't know. I have recently discovered; they now copied all the agreements I had with them under my daughter's details. It seems the mess continues with now my daughter being made their fall guy, the fear is she might even be blacklisted unwarranted so, for something she's not responsible nor accountable for.