VODACOM ******* - SWITCHING TO CELL C

Horrified that I've spent over R800 in the past month on data with Vodacom. I have wifi at work from 7am - 6pm and basically don't use my phone other than a brief look in the evenings. I chose prepaid so that I can monitor my usage however this is complete day light *******. I'm tired of their consultants calling me and literally stating that im over paying for data and trying to sell me a LTE. Their service is useless, I hate it and I will be switching to cell c on Saturday. And if its the last thing I do I'll make sure everyone that's willing to listen will know about how they ***** from their loyal customers. I was sitting at work on wifi and I got a message to say I'm out of data doesn't make sense as my data was off??? ******* SERVICE PROVIDER>>>