Vodacom the worst service provider without a doubt

I have a couple Vodacom contracts of which one is a data package. I have no phone for it, just a router that I bought myself and signed for R299 per months. About 3 months ago the installment went up to R600 per months and when I asked I was told it was due to the fact that I upgraded too soon. I hated the answer but paid for 3 months. I cancelled the contract the 2nd of June according to Vodacom and the Vodashop I visited last week to confirm that another amount would not go off. I received a statement of R1220 this month, my contract is R202 and my daughter R312 and according to vodacare my data contract should be R208 for things I subscribed to which is impossible as I cannot subscribe from a router. Regardless this totals up to just over R700 so why on earth is my account R1220. Vodacom cannot tell me why but if I dont pay they will freeze my other 2 contracts that I am more than willing to pay. I am sick of speaking to people who say the right things but nothing gets resolved. I will not upgrade my phone nor any of the other 5 contracts between my wife and myself as the problems with Vodacom seems to be unavoidable and inevitable and unsolvable. Vodacom is without a doubt the worst service provider.