Welcome to the board. I don't know much about the med situation in your region, sorry the oxygen is not an option, 33 year sufferer here and it's still my favorite approach!

Energy drinks, Monster, Rock Star, any containing the combo of caffiene and taurine. Chugged at the first sign of a hit many can abort or reduce an attack.

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They use "alternative" methods to bust their cycles. Outside of mainstream medicine, but turning out some great success stories. Given your lack of access to our standard treatments, this might be your best option. Wishing you luck and some pain free time soon.

Joe

If you're in St. Thomas or nearby, then you may have an actual advantage we don't - a legal, natural, powerful preventative, available for purchase (it's the same clusterbuster alternative Joe mentioned above):
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This clusterbuster preventative approach is something that more and more CH folk (especially ones for whom pharmaceuticals have failed) are gravitating towards and it is showing major promise in clinical studies by Harvard Medical et al. This Newsweek article on the subject is a good introduction:
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In the meantime, some no budget abortive techniques that work for some of us some of the time would be:

1) Jump in the car at onset, put your nose right up to the blasting/freezing air conditioner vent and breathe deeply. In 10 minutes or so your CH attack may be replaced by a tickly in comparison ice cream type headache. CH aborted. Could be helpful to hold ice cubes in your mouth on the CH side while doing this.

2) Extremely vigorous exercise at onset. Vigorous as in sprint all out til you drop.

thanks to all of you who have taken the time to offer advice and suggestions. Its really comforting to know that there are people who understand what I am going through. my wife have also for the first time understanding what being a cluster head is like, after reading the experience of some of you. for this I am eternally grateful. i have been able to get some verapamil and its giving me some relief. I am definitely going to try the online pharms.  I will stock up on some energy drinks for emergency.thank you all once again