1 gig data not recurring on 2 contracts

1 have 2 upgraded contracts and after 5 months of trying, vodacom cannot get their Top Engineers to sort out this problem. Every month i have to call in a spend hours with different agent to install my 1 gig data. I have communicated electronically and telephonically with vodacom but to no avail. Now my new contract has the same problem. Pls help solve this issue urgently