1995 isuzu transmission

Hi everyone, I recently had my 1995 transmission rebult, in 8/11/04. By September 04, it wasnt shifting again(automatic), so i took it back to the repair shop, cuz i have 1 year guarantee. The mechanic told me he need to replace the electrical system for the transmission which was not included in the original repair so i had to pay $200 xtra. but on the reciept it says "positon sensor" was replaced. I want to know if this is true or if he jipped me off. On top of that when i did go pick up my car after this repair, it wansnt shifting again, so i had it towed back in his shop and now he said it was that the battery wasnt connected right and because my transmission is electric that tends to happen and that also he had to change the selenoids, but on my original receipt dated August it states that he already did. What i want to know is if this sounds familiar to anyone or is this guy just taken me for a ride? some body please help, i feel like he didnt full fill the warranty he promissed by charging me !