Bonjour aidez moi s il vous plait c est urgent

Dear Joe, Sarah and Michael

I wanted so much to thank you for what you've done. (je sais pas ce qu'il s'est passé en fait....ils ont trouvé de l'argent et lui ont rendu ???? : si c'est ça j'invente une phrase dans ce sens). If you hadn't find the money and be as honest as you've been to give it back to me, I would have been in trouble.
You know as many old people, I don't trust banks that much and like to have my money next to me. 
But it's not the only reason. I hade been keeping  that money aside for a long time to offer a present to my grandson. He is my only family left. And as I know he takes care of my bank accounts, when I wan at the lottery, I didn't say anything to anyone and kept the money with me till his birthday. I know that his biggest dream is to go visiting Australia......And now, thank to you, I'm going to be able to offer him the present of his whole life !!

Dearest friends, I hope you'll come around to visit me soon for an afternoon tea!
I think you might have some surprises as well !
Sincerely yours