Migration of package

I've contacted Vodacom's Call Centre on the 24th of Feb 2016 to migrate my Smart XL package to the Smart L package. The guy at the call centre confirmed that it was changed (without written consent from me) and said the migration fee will be R473.10. I agreed on this package and it was changed \succesfully\". Last week when I tried to buy an extra data bundle (normally it was allocated towards my account), but when I tried to buy, they send a message \"insufficient funds\"! I've called the call centre and the guy that was doing the migration (on the 24th), migrated me to the UChoose Smart L Package. Not the package that I was asking for. Therefor I was paying 1 month's subscription of R579 instead of R529! I'm very unhappy, because I've paid R50 more the last month!! Vodacom must refund me the R50, because it's not my fault that they've changed it to the wrong package! The guy that I've spoken to last week, also submit the wrong package request to the back office!! I also called the call centre yesterday to confirm that my package was migrated to the correct package, but up until now, I didn't hear from Vodacom!! I want the Smart L package activated from 1 April 2016!!Very BAD service"