Beware Vodacom overcharging on premature cancellation quotes

Vodacom has for over a month now not resolved my query on the premature cancellation quote calculation under Subscription. I requested a quote for my cellphone and one for my wifi. The calculation is the monthly subscription x remaining months. On the quote for wifi they have R0.00x10 months=R4556. 52. Basic maths should alert anyone that this is incorrect as the answer would be R0.00. Vodacom insists that the quotes are correct and that the value cannot be tampered with. Well, clearly something is wrong!! I am so frustrated.