Acura at Oxmoor @ Neil Huffman Automotive Group, Oxmoor Acura dealer recommended the transmission flush to my 03 acura and i ask that service represntivitie louisville, Kentucky

Acura Oxmoor AKA Neil Huffman Automotive Group recommended the transmission flush, I asked the service Representative if i do the transmission flush, is it cause any problems to my transmission in future, he said no, not at all, and i believed these guys,changed the transmission flush at this place. after 2 months my transmission gone, when i ask these guys, they said it's almost two months, we didn't know what happened in these two months. this so ridiculous because i drove my car 90+ k miles with that transmission, these guys messed up my transmission while doing transmission flush., now they asked around 4400+ to rebuild the transmission. I don't know what the h*ll they did with my car when changing transmission... Any help would be Great.