Double Charging without notice

Vodacom is the worst place to ever get a contract from.<br> They tell you, you can upgrade 3 month prior to the date that your contract expires without telling you that you will be double billed for the next 3 months.<br> <br> They dont tell you when you upgrade that, that will happen. <br> <br> I will never in my life ever take out another contract from them.<br> I want to cancel all my contracts that i got with them.<br> <br> They must get better communication.<br>