Upgrade NOT processed!!!!!

After going in to Vodacom 4u Waterfall Mall and doing my upgrade with them on the 20th of September I received an sms today (9th of October) to say my upgrade has been processed. This after trying to figure out why my wifi isn't working for the last 3 days today it is clear that my 5GB top up was never upgraded to the 30GB top up like I signed in September!. Not only was I informed by sms, but after contacting the store, according to them, head office cancelled the upgrade they "don't know why, it's the system" so not only was my upgrade never processed but they absolutely have no worry about customer service and I was told that he "had to phone to reopen the deal" so I am very lucky that he did not just do his job in the first place!. So in other words, the upgrade that I signed was not processed and another upgrade was done without me signing for it, *****?