Services suspended

I have two contracts and upgraded both lines in October. I was told I will start paying the new contract in November, and that in October (25) I will my usual subscription, which I did. Prior to making payment in October I also called your customer care to confirm how much I should pay and was told I should pay my usual subscription, as anything under the new contracts will be paid on 25 November. Now all of a sudden my services are suspended. Can someone tell me why my services have been suspended? I paid R401.84 on 26 October. I received an SMS this morning that I need to pay R599.74 to restore services. I would have paid this amount in October if someone competent would have advised me correctly when I took time to call and enquire before I made payment. I never received any warning, nothing! Instead you send me a warning SMS today AFTER you suspended my services! Please acknowledge my payment for October and tell me what is going on with thid R599.74 you are now demanding!