Vodacom poor service

I've been a vodacom customer for 8 years and now that it is time to upgrade they have a problem with it they say that my rating is low due to other accounts are behind , i don't see what my other accounts have to do with them as they always get their payment of R3400 a month , they say i can upgrade but will have to pay in about R 3000 for 1 phone and about R 2500 for the other phone . If i had money to get a phone cash i wouldn't have contracts with them , i have spoken to so many people at vodacom but not 1 of them know what they doing there .........I think it's time for a change if vodacom is not going to sort my contract out . Very disappointed in vodacom