Ignition switch

When you say you replaced the switch, which part? The key and tumbler, or the plastic switch attached to the column? The actual switch is the latter! Remove the column covers, loosen the two small 5/16th screws but don't remove them, slide the switch towards the engine and see if it shuts off.
Move it back and forth until the desired position is achieved! Tighten screws. If this is inneffective, replace the switch.

Ok lets take cylinder back out dissconect battery put shifter in park remove cylinder make sure key is in off possition and reinstall

Make sure shift selector is in PARK fully and that the steering wheel is not locked up. Also try a spare key and lubricate the ignition lock cylinder with WD40.

This is a pretty common issue when one of two things happens. First the key is worn out so the suggestion of a spare key is a good one because it will most likely have clean cuts on the key to move the tumblers properly.

The second is the cylinder is seized so this is why you would need the lubricant. If you spray it in and let it sit for 10 minutes and then work the key back and forth and see if the ignition loosens up.

Let us know what you find and we can go from there. Thanks