Airtime and data vanished

I just want to voice the disappointment with the service I received from Vodacom. Last night when I slept I had R73 of airtime and I also had around about 11 MB data bundles. Today I woke up around about 08-00 with no data and no airtime. This really doesn't make sense. I was advised that my apps updated themselves and this costed me R73 airtime and about 4.16 MB within 30 minutes. This really doesn't make sense to me and I feel I was cheated by vodacom and I will be changing networks soon. I am not subscribe to anything on my phone. The sms updates shows my data was depleted at 08-03 but my airtime was finished with 30 minutes. I didn't even go to one social network or internet.<br> <br> Kind Regards<br> Nontando Ngcobo - ***