False Marketing, Poor Customer Service., Incompetend Staff

I recently took up a new LTE contract which was on promotion through Cell C call centre, upon signing up I was informed that I would get 100GB for R539.00 and I would be paying R70.00 for the first 3 months. An amount R269 was debited from acc, I called to enquire , the agent was unable to explain and advised to call ack after the 5th december as she would be able to refer to my statement. on the 6th December received my statement of which I am due to pay R1034, 07 December @08:40 I called and spoke to Philisiwe and was given ref ********** 213 and was advised I will be contacted by 10 December of which it never materialised. 11 Dec called back , my case was closed without being resolved was given another ref ********** 126 and was advised I will be contacted 15 December, as usual no contact was made. 18 December @10;56 I called back and spoke to Philile who advised me that she will escalate my query and would be contacted within an hour , which never happened. 19 December @11:48 I called spoke to Philile again to follow up , she hanged up the call on me.