Poor service

I have a cellphone contract with Telkom 8ta for more than 4 years. 2 weeks ago my number was ported to MTN, it was fixed the next day, 2 weeks ago my number just disappeared. I call the call centre twice a day, nobody did come back to me to give feedback. Then they have all sorts of stories, I am just asking give my number back. Can anyone PLEASE HELP me. I am so frustrated. You can contact me on my landline ***. Annemare