POOR SERVICE

I have a cell phone contract with Telkom 8ta for the past 4 years. On the 19th October 2015 my cell number was ported to MTN, without my permission, the problem was fixed within 1 day. On the 27th October 2015 the same thing happens, since the 27th October 2015, I struggle to get my number back. Today it is exactly 1 week. I still does not have my number back, I phone the call centre twice a day, the one guy told me to go to a Telkom shop, I went to a Telkom shop on Saturday. Every time they told me they will lock a case. Nobody can call me, because my number of the past 4 years does not exist on their records. I only want my number back, is that too much to ask? I am frustrated.