Mr popat, If some one intends to accept the haq then even 5 minutes is enough for him, .Otherwise if hidayat is not in some ones muqadder then there were people in our beloved prophet times whom he gave dawa but they did not accepted it. Who is better in dawah then our beloved (fidaka abbi wa ummi).
Ok do one thing as favour for us, try praying for our hidayat sincerely, i will pray for yours, inshallah ALLAH will show us the right path if we are sincere. and rereview this thread with intention to find haq not to counter argue with us.