Unfair Market Practice

Cut a long story short, I contacted the vodacom accounts dept over the weekend, asking for a settlement on my contracts with Vodacom. I was quoted over the phone an amount - I then asked the person to email it to me - he didn't, despite me phonetically spelling it out for him - incompetence. Tue 22nd Aug I contacted the accounts dept again, this time the person I spoke to sent it to me, however, it was roughly R7000 more than the previous verbal quote. I asked the person why and he said it was because of vat to be added - this is utterly ridiculous in my opinion. I told the agent that didnt make sense and he put me on hold while he 'checked'. After he came back he told me he didnt understand it either. I contacted vodacom and asked the agent for their head office contact details and I sent my complaint via email... no response within 24hrs as advised by the auto response. If that settlement is supposed to be correct, then the only thing I can deduce is that vodacom has somehow deceptively structured contracts into deadlocking customers into taking their contracts to term instead of settling early if they wish to (everyone should have a right to pay up and settle early if they want to). To quote a settlement that is almost R4000 more than if I had paid in 15 installments is absolutely deveptive, ********* and despicable.