Dissatisfied with Vodacoms service

I had recently upgraded my vodacom contract. Whilst speaking to the sales consultant, I advised her that I am not prepared to upgrade if my contract doesn't remain as is but just the addition would be the device. The following month I noticed that I only received the airtime not data as I previously had. I lodged a complaint with vodacom and was notified that it would take up to 5 to 7 working days to listen to the voice recording and they will get back to me. It's now over 3 weeks and to date have not received a response I this regard.