Recharge and not get the airtime

I'm so tired of vodacom, I recharge and not get my airtime. I play shake and get an offer of 100MB for R3,50, I will pay this with advance or my airtime. They'll deduct my airtime or give me an advance and I won't recieve the 100MB. When I recharge they'll take the R3,50 even if I did not recieve the Data. It happened to me multiple times. I'm so disappointed because I love vodacom and I have been using it since 2013 and I have registered a lot of things with the contact number. It is so useless to call the customer number cos it never takes me to the consultants.