what about any punctures or it can be that if any part of your tire was pressed against a pavement it may have go a bulge that is wobbling the car. start by checking the tires.
this no one can say how these denters work as this purely depends on where the dent is and how bad it is if these are small or tiny dents then i am sure that they dont remove the parts to remove the dents but if its a huge dent then they may even replace the part if they cant remove the dent like in most major accidents so it all depends on the dent or you can say damage.
hahahahahahahaah, check fuse yes but if that's what you have done already then check the buttons if they are working. then check the wiring if any of them is burnt or broken. Electric seats are delicate and has a lot of electric work behind it. If all after this the seats still are not working then let an electrician do is job to fix it.