Sorry dear, you have lost the right to claim by reaching the airport just one hr before departure. Moreover, according to you, your one hr included other formalities like baggage screening which in turn included queuing up time for the screening. So you must have reached the desk barely 40 to 45 min before departure of your flight which was to be followed by immigration. Not enough by any means.

I have missed a flight for exactly the same reasons as yours. "1 hr", but then I knew it was my fault. I accepted it and the airlines cooperated buy accommodating me on the next flight next day without any penalty whatsoever.