Bad Service

For years now I have been searching for answers and have called and contacted Vodacom. I left MTN and went to Vodacom, what a grave error. on the help site there is no where, where a person acan send a mail, or no where easy that I could find. The other question is why does my data that I by for emergencies expire after a time? The are literally *****ing our money. I paid for my data and only use it when there are power failures, then just to loose it when i don't use it quick enough to thier liking. Then they cant even sort out myvodacom app on my android and its been months.