what was offered in the deal was kept t.

I received a phone call from Telkom Mobile to upgrade my existing contract which had already expired and I was paying the monthly amount. They offered me a deal to upgrade my contract from a blackberry curve to a Samsung Galaxy S4mini. The contract amount being R189 per month which includes 75mb data and 50mins airtime. They offered me this promotional deal awarding me with six months UNLIMiTED DATA from October to end March 2015 plus free airtime for calls to telkom numbers. I agreed and took the contract out which was supposed be delivered to me within a couple of days. I waited a week. Then two to three days to activate the phone. Then I waited another couple of days for data. Once I got the first data it only lasted a couple of days then it was depleted and I get sms saying I must buy data. I phone the queries every week at least three times or sometimes everyday. They promise to sort out the problem but after waiting day after day I sometimes get a phone call saying data will be loaded and sometimes nothing or sometimes I get data to last a week at the most. They have recorded all my phone calls numerous times. Now the latest was 1/2/15 I get sms saying I have been once again