data and airtime finished in less than 1 minute...

I recharged with R12 and bought daily bundles for R6 for 60mb but within a minute all my airtime and data was depleted but funny thing i did not use it for internet all i did was to turn on my what's app which strangely it actually took all my 60mb data and R7 worth of airtime but i only received 6 what's app texts. Funny enough i tried to buy 50mb for R3 for an hour just to be sure it wasn't a glitch but again it depleted my 50mb in less than a minute so i called the call centre and they couldn't help all they said was it was my internet but how can 110 mb be depletedin less than a minute this is very strange and since i am loosing money in this i like to warm everyone not to use vodacom until this issue is resolved and i get my data back. Now i am broke because i used all my money to buy data.