Data being ****** from Vodacom

Me and my wife bought airtime and data over a two month period and on all occasions the airtime and data would run out within minutes of doing no real internet activity as I have wifi at work and so does my wife. It has now ended with me opting for a cell c contract (new number)and I am looking at porting our numbers to telkom as well. The Vodacom network in my area has also went from a 10 to a 3. Very poor. I would like to see if VOdacom will reimburse us the data which was lost between me and my wife. I bought her airtime a few days ago and she had to resort to buying a daily bundle to avoid Vodacom ripping us again.