Data not loaded

I went to a Vodacom Data store in Tyger Valley to change my data bundle from a 3GB to a 10GB. The assistant informed me that it will only apply from the 1st of May. When my data bundle didn't recharge by the 3rd, I started calling to find out what is going on. I had no data loaded on my account, not the new 10GB bundle or my old 3GB bundle....nothing!. I have logged calls and still not closer to getting data. I am very tired of your service or lack thereof! I will definitely be cancelling my contract in October and I really hope you are not charging me for the nonexistent data bundle! Just to be clear, the staff of Tyger Valley Data store was very helpful.