Beware when upgrding your contract !!!!

In Aug 2015 I upgraded telephoniccally , I was on Weekender Plus contract but alas no more such contract did exsit. But I upgrded to Smart S monthly R379.00 Plus some R17.00 for detail account b. I asked the operator whilst upgrading , if my data /airtime runs out , would I be able to top up by purchasing .NOW-WHERE was I informed it is OPEN contract , I was under inpression once data/airtime finished I must buy.Friday i phoned to find out what my acc amount was. TO MY Astonishment I sat on R1000.00 already , contract only started 30/8/2015. After phoning client services /account queries etc I was promised by Mon someone will contact me I received an SMS on Saturday no ref no and that is that .<br>