Telkom holding customers hostage

After having the fibre lines internet and still having issues with internet speed at my home my family and I decided to end our internet contract with Telkom and move on to another network. In the beginning of December we gave Telkom our notice with all the required documentation. A week letter they emailed my brother back asking for the documents again. We resent the documents to avoid any conflict as we needed to move to another network urgently. Between the 10th and 12th January our internet was cut by Telkom with no notice. My brother then called to obtain the reference number that was needed to move networks and Telkom refused to provide us with this information. With much difficulty, we found another network who was willing to assist us to considering the circumstances. We then got a call from Cell C today explaining that Telkom blocked our number as theirs so no other server can connect us with theirs. My family feel like we are held hostage by Telkom as their customers. This is not the first or second time I have had an issue with Telkom which is why it is of great urgency that I would like to stop working with them. Kindly deal with this matter urgently.