FNB Connect, no connection but chowing data!!!

So I have been with FNB for the past 16 years, my vehicle and home loan are also with the bank. When FNB Connect was introduced I was amongst the first people to sign up for it, and have been using it since. For the past couple of years (I think 4 years) I’ve never really had bad issues with the service up until last night. On my sleep, for some reason (as suggested by Elvira Moses and team) at 1:00, I consumed a once off 2G of data, with one transaction. Mind you, I’ve NEVER BEEN A PERSON THAT SWITCHES OFF THEIR DATA, AT ALL, all these years, and then yesterday I’m told I just consumed 2G, with one transaction, WHILE I WAS SLEEPING. The service and response, together with the carelessness from the Team Leader Elvira Moses telling me THEY WILL NOT REFUND ME MY DATA, even before they receive whatever the data report is. I have full access to WiFi at home, CAN I JUST LOSE 2G OF DATA, ON MY SLEEP. Is FNB another MTN? Where customers just have their data disappear??? As customers, must we really rely on bodies such as ICASA to have our matters resolved?? I’m utterly disgusted by this treatment, and of course using my hard earned money to enrich FNB.