Whatsapp data not working

So i have been having network problems for more than 5 days now and this is becoming very irritating. I have loaded the 1GB Whatsapp data but my whatsapp just stopped for no specific reason. i still have 712 MB that i unfortunately cannot use and there is no reason offered on why this is the case. I now need to use Wifi to use whataspp and its been 5 days thus far but i have data that i should be using but i cant. This is my 2nd time loading this data and the first GB worked just fine, but with this one, i dont understand what the problem. i have been calling MTN , having to have my internet settings changed, given the *123*11# to dial, asked to reboot my phone and wait for 10 minutes each time, i was told its my APN or my GPRS settings and that this is normal but funny enough, this has never happened to me before. I really cant be going around in circles to get assistance on one simple matter. Can MTN assist me or Not because why have data if i cant use it? I got the reference number : SMC/ ********** 8635 and i am being told of waiting for 2 to 24 hours, i mean do i really have to go to through another day hoping that i have been assistance, which haven't worked thus far or do i just need to port!