1996 Dodge Stratus CrankShaft Pulley Damage

I put my 96 stratus in the shop for routine maintenance and tie rod ends, I was specific about what the problem was, (I had trouble shot it) and knew what I wanted done, front end sticking in turns, power steering belt loose? (Drive belts)needed replacement (loose from age), check to see if noise in front end was a bearing noise, they took it on themselves to? Inspect my car? Looked at timing, brakes, sensors, etc tried to sell me a new timing belt, pulleys etc but the belt I had only had 30000 miles on it, the engine was mechanically sound. Drive belts (yes) tie rods, yes, alignment, yes once they gave me the 2600.00 estimate of recommendations I explained it hadn't been that long on timing, that the car ran fine, that the 160 dollar brake shoes and the 200 dollar rotors where still warranted, passed on most of the up sell. OK'd 2 belts, tie rod ends, alignment and decided to have them change the plugs while they had it.
Got the car back, front end squeaked on drivers side, belts chirping, they lost a belt cover?HOW? No idea, my car started throwing crazy codes, the speedometer was fluxing, settles in and the odometer and the tachometer were fluctuating the car would surge when the tach would kick off and on last but not least the belt running off the crankshaft was wrapped around the pulley it went from a chirp to a squeal, I had brought all this to their attention ( except the belt off pulley as I hadn't seen it until that date ) they just blew me off, ordered the wrong replacement part, told me I didn't need the one they lost, finally I was able to get a hold of the service managers voice mail, and he wouldn't call me back he had the service adviser (who'd been dodging my calls ) call me, they said they would come and get it with a truck, they had it 1 hr and called telling me my crankshaft pulley shaft and bolt was stripped, that it looked like some one took a hammer to it? That it was whomever changed my timing belts fault( 8 yrs earlier ) that I needed to call them, and figure how they am going to pay for this repair. My question can a belt being misaligned, or wrapped around the edge of a pulley cause that type of damage to the bolt in a crankshaft? It was way too tight I couldn't get a pc of paper between it or the belt when I took pics of it, or do they loosen this bolt to put on the belt or when they inspected my timing? Prior to this car used 1 tank of gas a month after I got it back it ate 3 tanks in less than 6 weeks, I have read all I can, I have a brain injury and I'm lost, all I have heard is WERE NOT LIABLE. I asked them to check that pulley to make sure it wasn't damaged after the fiasco with the belt I figured, a straight edge, a laser, a ruler, spin the pulleys, did not ever authorize them to pull it off and do not believe I have been driving with a stripped crankshaft and bolt for 8 yrs? I have a brain injury so I wrote it all down as it happened, now they want me to pay them 1350.00 ( a reduced rate to 75. Hr And a crankshaft + Core ) + what ever else it takes to replace the cranks shaft? Can you see any thing that may have caused this? I read if belts too tight it can spin pulleys backwards, would that cause this? Thank you and I'm sorry its so long I tried to donate 5.00 but the page wasnt incripted email me a mailing address and I will. Send a few dollars thank you.