Broker Prints price - Advice

What should I do if my broker (GFT) prints a currency 10 pips above any other broker I can find, which so happens is just enough to trigger my SL? Is this foul play, is there a way to deal with this seemingly malicious manipulation.

Probably no legal recourse, they can in effect quote and fill whatever they like, it will be in their customer agreement somewhere.

If it was me I'd gather all the relevant information needed ie which brokers you're comparing against and respective spreads at the time etc, and then try to present your complaint in a professional, reasonable, calm, and factual manner to their customer support.

They may offer to reimburse the loss as an act of good faith in the interest of customer relations, but as far as I know they're not obliged to.

I think first you need to make absolutely sure of your facts, maybe post details of pair/time/quote/spread and let others post their charts, it's possible you've made a mistake, it's easily done.