Poor customer care, no feedback

I am experiencing real problems with the cellc network. I bought a R1399, 100GB data sim but at times it is so slow and also just stops working. Prior to this, having used 3 other network providers i have had almost no issues. So i contacted cell c via email. They asked me to fill in a form which i did and a technician will investigate.<br> On Friday 24/feb I received a call from the technical department which I missed. I then received an sms with a reference number. I called the call center and gave the reference number. I spoke to 2 consultants who both could not help me because they couldn't see the comments. The second consultant then told me that a technician from cellc will call me to discuss from 2 hrs to 24 hrs. I have received a call only on the 2/march and the technician told me that the distance, frequency and high traffic are contributing factors to the problem. After a long discussion with me, he basically told me that there is nothing that he can do. So i end up having bought a sim worth a lot of money and i am not satisfied!