Pathetic Service

I have been a customer with Vodacom for years now and honestly I am sick & tired. I have 2 numbers with Vodacom & I am being told I cannot upgrade the one number because there is no funds. Logically it makes no sense because I have always paid on time & none of my accounts are in arrears. I am beyond frustrated with this. On top of all of this, Vodacom decides what amount they want to budget me going forward so now the contract options I have are lesser than what I currently pay? This is the last Vodacom will have business from me