Refund due to no service

Apparently, a new unit was delivered to our house meant to replace the already installed ADSL line. This was a forced migration. We never received that unit, this was meant to be last year in September. This unit was activated and the ADSL deactivated. This means we did not have internet during this, following numerous calls back and forth with both sales and tech department we failed to get the problem resolved eventually cancelled the contract as this is breach of contract (Telkom taking money yet not delivering on the service), this was 6 months after trying to resolve this issue. The contract is now cancelled and we want our money which was debitted since the new unit was activated in September.