Dissapearing data, call time and sms's

I phoned 111 and they could not solve my problem, then I emailed Vodacom Customer Care line with screen shots of my problem and I do not get any responses from them. On the 1st of September I checked my Vodacom app and it showed that nearly half my data has been used (I was in a Wi-Fi area the whole day and hardly used my phone), my calls were not at 100% (I had not made a call from my cellphone all day so how could I have used up call time) and my sms's were decreased (I had not sent 1 sms all day). This is not the first month that this has happened. Please can Vodacom investigate the problem. I have checked my handset and my apps are not depleting my data and I work from home so I use my Wi-Fi 80% of the time.