Try resolve problems, and then just stops

I complained about bad service i received the other day at one of the branches, the next day a customer service employee contacted me to apologise and offer me a 1 gig 30 day data bundle to say sorry. well 7 days later, after only used roughly half of it, suddenly all my data is gone for no apparent reason. i don't know if its their plan to get customers happy again and then once they have forgotten about it they slowly just dump the customer again. Even less impressed by vodacom and their stand point on customer service, because you have mad it pretty clear that you don't actually care about them.