I've raised £2500 to HELP GET CHINA BACK HOME!! my horse was on loan and has been sold and now in ireland,please please help me get her back home

i put my mare china on loan 5 years a good to a(what i thought was a good home) up until now,the current loaners said a few years ago she had arthritis however with me knowing them just left them to their own device to get on with her as i put full trust in them hardly ever bothered them,so they had her jock injected(so they say)however now they said she had been put to sleep in march along with another one of their old mares ,prior to this their was no contact to say she was bad or worse or whatever,they failed to inform me or ask my permission until i have asked about her just a few days ago,and now they won’t give me any vets details who put her to sleep or dealt with this situation,I currently hold her passport and she is my horse and is now FOR SALE IN IRELAND!!i really need her back home please please help as much as you can❤️🐴