2017 Dodge Lonestar less than 40,000 miles won't start

My Dodge got sunk into a mud hole had it
winched out it started that night but would
not go into Park or reverse and now it won't
start I think the battery is dead but have no
mechanical experience so not sure what to
do it is at the dealership but they're asking
way too much to even look at it does anyone
have any advice