Misleading contract information

On 5 October 2015, I upgraded my cell phone contract with Vodacom. The Agent informed me that my screen insurance is for 24 months, now I hear that it is only for 12 months and that I need to take out the additional 12 months insurance.<br> <br> Is this the way Vodacom does business, by luring clients with too good to be true information and after obtaining your buy-in, every Agent you speak to, informs you that there's nothing they can do about it.<br> <br> They kindly inform you that \this call will be recorded"but when you ask for the recording between yourself and the lying Agent"