Data Bundle Billing

I have on several oocassions questioned the Vodacom data bundles (both normal & promotional) that quickly depletes. Last Wednesday I bought R29 (100MB) bundles of which were to be used for whatsapp. The data bundles were finished within 2hrs and having closed all on going apps, this came as a shock to me. <br> <br> Again, this morning I bought 2 promotional data bundles (50MB) which amounted to 100MB for me to use within one hour. Both were bought @ 01h27am and 01h28 respectively, however I received an sms (01h37am) notifying me of 19.76MB left. I am utterly disgusted with Vodacom ripping me off and have decided to use another network. I have decided to get assitance from Hello Peter as Vodacom come up with all sorts of excuses in the book avoiding refunding its customers. PLEASE HELP