How Telkom stole R3000 from us...

We left our flat in April last year. I cancelled my Telkom contract then via their old system, that didn't work, so they created a new system online, so I cancelled via that too, almost a year later I am still receiving invoices for their service, more than R3000 worth of them. There needs to be a class action lawsuit around this because they are *****ing money from so many people with the threat of blacklisting. Does anyone know how to fix this without having to contact their costumer care line or go into a branch, those things didn't work and I am not in SA for the next six months?? #crime #telkom