STILL waiting for my credit after cancelling my account in 2015

I have been in touch with Celiwe from the hello Peter team at Telkom. After receiving one email from them I sent all the previous relevant documents I originally sent to Telkom in 2015. After this, I didn't get any response and still no credit in my account. This is the worst service I have ever had from any company. I will never ever use Telkom again for anything! I still expect someone to get in touch with me to resolve this and give me my money owed.