Telkom the worst service provider

Telkom lines were ****** in my area and telkom refused to replace them after 2 months of investigating and after I had already paid them for their services which cost R579 a month and they insisted I pay before they give me the service. Months later I found out that they were still billing me and I was in arrears of R1279 and yet I thought they owed me the same amount of money and when I fought with them for months again they withdrew some of the charges and not all stating I still had to pay for the line rental which they themselves told me it no longer existed and they weren't replacing it. But the worst is the fact that they seem not even interested to pay me back my R700 deposit.