burnt again need advice

[snc4life]

hey guys need some advice as to what to do last fall i had a th350 rebuilt for my new motor by a local shop the trans worked flawless before i took it down as it had been rebuilt not long before i just wanted a once over and a shift kit put in and while it was there a stall to match my new cam anyway all was done and everything checked out good so about a week ago the weather broke and i bolted my tranny to my new motor and bolted it in poured in the oil they supplied me with and fired it up to find out it doesn't work its full of oil every thing hooked up and the truck won't move untill 2500 rpm then it just slips bad won't shift and so on she's a real turd i went back to the shop told him the story and he told me since they didn't install it in the truck the best he could do was rebuild it again for 850 im already in it for 1,072.50 for the convertor and 446.05 for the inspection and shift kit plus 800 for the first rebuild im very upset at this point i found out i can buy a brand new b&m from a perf shop three hours away for 940 and a holeshot 3000 stall for 340 they'll ship it for 45 and back it i think thats what i'll have to do more money but what do you do any one have any imput i think they should back there work but i guess i can't force them and i just have to take that and roll with it