As a DFed JW how can I say Thank You with out offending JW's?

OK I am DFed Is it OK to say thank you to the Dundas Congregation for caring for my mother after a stroke , it is not her congregation but I moved her close to me & they are really doing their best to help. Now they are trying to help me return to the one true faith . I understand why I am DFed & the need to keep worship pure not like false Christians who just put up with any behavior to keep the false believe Jesus loves everyone & accepts your mistakes no matter how dirty it makes their religion. So what is the best way to show my appreciation of what the congregation is doing ? Note I do not expect JW's to answer but I hope some of you read it & know from the bottom of my heart I thank you....Dislike me but my mother is faithful .