NO SATISFACTION

I have been contacting customer service on 173 a few times regarding my BIS. Since yesterday 24/02/2016 late afternoon I have not been receiving bbm's or whatsapp messages. Everytime they tell me to turn my netwotk off, take out the battery and sim card and wait from 5-10mins and reboot my phone. I did that and nothing helped. Called them back for literally the 10th time and they tell me to call technical support on 083155. I phoned 5 times and got through to customer service again. After asking them 3 times to transfer me to tech support , I get transferred back to customer care. Do they know what they are doing there???? Went to mtn service centre, had to wait more than half hour for data tech as he would only be in then. He did a few stuff on my phone and what a surprise, still not working. Tell me to wait couple of hours & phone cust care again. Seriously now. So now my airtime is being used for whatsapp and whatever I do on my phone. My airtime is also being used when BIS activated for whatsapp and facebook since December 2015. Whats up with this? Called them and no joy with this as well and different explanations as why this is happening. None of them satisfactory answers!!!