GringoPost | Ecuador: How can I turn off gas heater with a broken valve

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How can I turn off gas heater with a broken valve

Help I cannot turn off my Ragatzi gas heater. I'm pretty sure the plastic valve in the regulator is broken because nothing happens when I turn the valve to the off /down position. I've tried turning it off and on several times, but nothing happens and there is no resistance or click as before. Main problem is that I am afraid to disengage the regulator because of the open flame which I cannot turn off. Any ideas?

1. Is there some way to safely extinguish the flame?
2. Has anyone had and solved this problem or do I need to contact a professional gas fitter?
3. Can anyone recommend a professional gas fitter?

Thanks

Patricia