Thanks Vodacom for your "great service"

I have this continuous problem of my monthly airtime just "dissappearing" for example I would purchase 1 hourly gig at R12 then only to look again and additional airtime is missing. This is not the only incident. On multiple occasions I get these stupid messages saying that I've used out of bundle rates to the value of x amount then I would check my balance and then a quarter or x amount is missing even though I haven't used ANY?? I'm sick of Vodacom and their non transparency. How can you claim to be the "best network" if service centre can't resolve issues like this in a couple of months. I feel as though this is a generous window. I will not bother to contact Vodacom again and be promised another non-response. Instead I will gladly wait the duration of my contract and then make my move. I guess at the end of the day it's all about the money. Until then enjoy taking my airtime clearly you need it more than me.