Worse service ever

I opened a new cellphone contract with MTN, guys these people sent me an incorrect contract twice. I told them again the contract is still incorrect they never rep**** or got called me back. They captured the incorrect banking details I made an effort to call them before my debit order to ask them to fix it they said they were offline I asked for their banking details they gave me and I made a payment. Guess what they sent me messages after that saying my line will be disconnected cause I have not paid. I kept calling them the whole week but they keep saying they're online. DON'T EVER USE MTN FOR ANY CONTRACT SUBSCRIPTIONS. WORSE SERVICE EVER.