Frustrated Telkom Customer

The service from Telkom is pathetic to say the least. We have two cellphone contracts with Telkom which is due to end. We had to go into a branch just to say we will be cancelling the contract at the end of the term. We also had to give a 30-day notice which is absurd when the contract is due to end. The agents have been calling myself and my partner every single day. They call me asking for my partner and call my partner asking for me even after we told them that we will not be renewing these contacts. I have been blocking every number, but they call from a different number each time. I am very frustrated and annoyed to say the least.