Data query

This has been an ongoing query from the start of my contract. Im due for an upgrade this year but i am contemplating whether i will indeed proceed. I have to phone lines. The one i am questioning us the ***. The data on this phone just dissapears and everytime vodacoms explaination is open applications. An open application does not pull 300mb in a few minutes. Dont tell me i should phone iphone. You are my service provider not iphone. If i ask you for a supervisor dont question me about it. Dont tell me none is available (agent: lesego tau). My fiance had to phone a few times to no avail even after this was escalated to your back office. Very unprofessional! I want this to be sorted out immediately!