Activation Problem

UI purchased "Bitdefender Total Security on line about 2 hours ago, my wife called me to take my diner so I left my PC before I activated the program. When I got back to my PC yhe screen was no longer there I wen back to my emaiolsa and found the Activation Screen, but when I entered the Code, it didn`t accept it. I contacted Support on the Menu and gave a description of events and I received an email back which told me to contact support?