Bad Customer Service Vodacom Eastrand Mall

I upgraded from a tablet I took 2 years ago to a Samsung A 7 2107 on Sat 25 February 2017. The consultant at the Vodacom store in Eastrand Mall activated the phone using my wife's simcard and not the sim I upgraded on, I did not have a problem with it as I took the phone for my wife. I also took out insurance on the phone. Recently the phone stopped working, I assume its the LCD..I. took the phone to Vodacom Eastrand Mall to have it booked in for repairs and they simply refused to book it in, claiming insurance wont cover repairs as I have not been using the sim in the phone. Firstly, I'm paying for it and I dp use the data on the sim on another phone, secondly why didthe consultant activate the phone with mu wife's sim and not with mysin if she knew it would be a problem.