The problem is that you were off-loaded already for 3 times. And I think your name is already on their "watchlist" of Filipinos who are really trying to get out of the Philippines for good (I hope so not) as you said you were off-loaded by the same officer. So I guess he is already familiar with you.

Where are you in the Philippines by the way? If your in the Visayas, try leaving the country tru the Cebu International Airport or if your in the northern part of Luzon, use the Subic International Airport. I don't know if your name would appear in the immigration's list on those two airports I have mentioned but just give a try. Furthermore, don't go direct to Doha, instead have a 5 day tour first in Hongkong - as in real tour with all the iterinaries, back and forth tickets (Subic/Cebu - Hongkong then Hongkong - Subic/Cebu) and hotel accommodation. A travel and tour agency is the best solution for this matter. Quite expensive but that's the risk you'll have to take to conceal your real intentions. After your 5 day tour in Hongkong, no need now of course to go back to the Philippines but you'll be setting foot now to go to Qatar via Hongkong. That was so far the tactic I have recommended to my friend. He is now here in Doha. Just try your luck with that suggestion and good luck.