****/unprofessional service

About a week ago I went in to collect my IPhone after sending it in for a battery replacement. I was very very unhappy to find that I had to pay for the replacement after one of the staff members told me that I am covered and won't be paying for the replacement. This is what he said when I booked my phone in the week just before that. I wasn't even aware of my coverage until he mentioned it. I would like to have my money back since the Istore staff member **** to me and gave me false information. You cannot tell a client that they won't need to pay and then they end up paying. That is lying and *********. I informed the manager about my unhappiness and he clearly did not care since all he good say is sorry with an attitude that couldn't wait for me to leave the store. What is Istore South Africa going to do about this?