Sick and tired of getting no response!

I upgraded my contract on black Friday number ********** 664. (the same day MTN did there deal with 50gigs of data)I only upgraded this contract due to the fact it would come with 20 gigs of data for the duration of the contract. After finally fighting for Vodacom to activate this on my contract it went well for 6 months, until the 1st of this month. I never received anything this month. I went to Vodacom here in Newcastle on the 2nd of October and still have had no joy as to when this will be sorted out. I have to keep buying data and I am really at my wits end as to what to do now. I feel very disgruntled and betrayed by Vodacom once again! I will be looking for other options in the near future. Please help me with this complaint!