I NEED FEEDBACK AND FUNDS PAID BACK TO ME

My account was handed over to Telkom collections who are Blake and Attorneys about 2 years ago. I have paid my account in full and received a letter stating my account is paid in full. With this, I received a call from one of the Telkom agents advising me my account has been paid in full and that I am sitting with a credit of R700 odd. When I asked the agent how I need to go about getting the funds paid to me she said that she will go a ticket and one of their accounts people will make contact with me ( this now being 3 weeks). I have attempted to call them and I have also sent numerous emails asking for assistance. Emails sent to 1. Khosi Mazibuko Credit Management Delisting. 2. Natasha Nelson. 3. Telkom Collections <***>. I have even logged a request on ****edcustomer whereby the complaint goes straight to their head office. Can someone from Telkom make contact and advise how I can get the funds in credit paid back to me........................