Bad feedback regarding cancellation of landline (Account number ***)

To whom it may concern, I recently relocated to another address, and submitted all of the required landline cancellation documentation (i.e. service cancellation form and copy of account holder's ID) to *** on 12 April 2016. I have still not received any feedback regarding my cancellation progress, despite asking for feedback on 19 April and 25 April. I hope I will not be held responsible for any further monthly costs associated with the line, as a result of a lack of action from Telkom's side. Peter