Telkom is *********

I'm struggling with network and it affects my work as I'm working from home. Many calls to 081180 were made, always log a incident and the technicians don't even bother. I visited Wonder Park TDS x4 in 1 month they told me they can't help me the technician will call within 72hrs but nothing is happening. I requested to cancel my new contract I was told they don't take the device back I have to be penalized and that money will be deducted in cash from my account. It means as a customer I don't have a right to complain about their bad service. Why must I keep the device which they are not providing service for but they take a full debit order without fail every month?