Unfair Treatment

I went to upgrade my cell phone on the Red Package + and was informed that my credit rating is only Level 4 and cannot stay on the the Red Package + as the credit rating needs to be Level 7. This obviously left me flabbergasted as my credit rating was good enough to pay the rate for the package for the last 2 years and there is no reason why my credit rating should have been downgraded as there are no outstanding amounts. Furthermore there has been no communication from Vodacom notifying of such down grade. There was no explanation from the branch as to why this is so and on top of that the consultant who handled my query said I should receive an "sms" confirming that she has raised a query but of course no such messaged received.