Upgrade complaint

I have been a client of Vodacom for 10 years, I am upgrading in a months time but now yesterday my phone broke unexpectedly and I asked them if I can upgrade prematurely, I mean I have never missed a payment and been a client of them for a long time and now they are telling me you have to have an average bill of R1200 a month which I do not have, but they do not even take anything else in consideration. I feel this is rather unfair and that they only care about money not about their clients, so I will not be upgrading with them anymore and I will tell everybody I know how they feel about their loyal clients. It is not like I want to upgrade a year into the contract, its only a month from expiration. Now I have to drive around without a cellphone and its dangerous.