Still waiting for my proof of purchase

Called FNB smart device branch and told them that my device is not switching on and its not even 6 months old, still perfect condition. I was told to take it to a iStore with my proof of purchase but i still haven't received any email from them. I need to get my device checked out ASAP. I need to take it to the iStore in the next hour. Won't be surprised to get the proof of purchase after one week. But they are quick to my money.