Bad service/breach of contract and billing

About 3 weeks 4 weeks ago I received a call from a sell direct consultant informing me about all the great telkom deals they have on the new Samsung A5/7 and she read me all the terms and conditions and also told me what comes with the package including unlimited telkom data come this month it was a whole different story got everything I had on my previous contract with 8ta when I tried 2 call them about this and I tried many times they don't pick up and telkom also billed me R771 for this and also included my old device who's contract expired about 2 months ago and the device I have now would have cost me R319 and is now.I'm thinking about taking legal action and send this device back as this is a breach in contract from their side they rub stuff off on u and don't want 2 take responsibility for their actions but they forget that all calls have been recorded from their side and mine.I WANT TO WARN ANYONE WHO IS THINKING ABOUT USING THEIR SERVICES NOT TO DO SO ONCE THY RUB IT OFF ON U THEY TREAT U LIKE **** BE WARNED THESE SELL DIRECT IS BAD NEWS