Tburnham18,
If the motor can't move the sunroof to close it, then the mechanical wrench method (see your owner's manual) won't work either.
From your description, the motor gears, or the two long toothed whips that pull/push the sunroof have stripped at the motor or broken, or the attachment points of the whips to the sunroof have broken or stripped.
Your best move at this point is to pull down the headliner from the rear of the tailgate opening so you can disconnect the the motor entirely (generally pull the B and C pillars, pull the rear door weatherstripping half way down the door openings from the top, remove any ceiling plastic plugs, assist handles, overhead light assemblies. With the motor gone, you might be able to move the sunroof by hand back into its closed position, and then from outside the car tape it well into position all around its seal to prevent it moving.
Be aware that only four 10 mm bolts hold the sunroof to its moving mechanism, so that if you can get it to the point forward where you can get at the 4 bolts, disconnect it, pop it into its opening from atop the car, properly block it in place from below, and then tape it in place from outside. (Take lots of tape with you so that if the wind starts pulling it off, you can put more down.
Do not take the car to a dealership for a fix as you'll be looking at as much as $2500. Buy a complete sunroof system from a wrecking yard as they are easy to change out and may be as cheap as $75 to buy used. They are easy to change out but are time consuming (hence the $2500 dealership quote). I've done several sunroof assembly changeouts over the years, and the only special tool required is a Torx 55 bit for the shoulder belt anchors, in order to remove the B and C pillar moldings to drop the headliner.
Good Luck!