Garbage disposal will not reset. How do I fix this? Do I need a new one?

SOURCE: How to knock out garbage disposal plug

Turn off the power source to the garbage disposal. Take the drain hose from the dishwasher off the connector going to the disposal (if connected). Insert a flat blade screwdriver in the drain hose fitting and tap a few times with a hammer. The plastic plug will pop off inside the garbage disposal. Reach inside from the top of the disposal to retrieve the plastic plug. Sometimes you have to use a little force to tap the plug out. Hope this helps you.

SOURCE: BADGER GARBAGE DISPOSAL just humms. does not work.

It sounds like the disposer has something jamming it. Try using the breaker wrench supplied with the disposer (or a suitable-size hex wrench) fitted into the socket on the bottom. Rock the wrench back and forth to see if you can loosen the jam. Another trick is to use a wooden rod (end of a broom handle, for example) to push on the blade to try dislodging the jam. Look inside with a flashlight to see if there is something that is easily missed. (I have found drink can tabs, coins and a shelf clip that way.)

It's also possible the motor starting capacitor inside the disposer or the motor itself is bad, in which case you would probably spend less on a new disposer than on repairing this one. But a jam is more likely.

SOURCE: garbage disposal leak

Don to install a new one.
don't think it is a DYI and by the time you call for service it would be cheaper and use your DIY.
Hope this is a FixYa
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Kurt

SOURCE: Removing dishwasher drain plug on a new garbage disposal.

The plug is thin plastic. Use a flat blade screw driver and a hammer to knock it out. I know this sounds primitive but this is how it is done. I have been a plumber for thirty years.

SOURCE: Resetting Garbage Disposal

should have came with a alen key use it. to loosen the blades that are stuck on the bottom of the gaburator theree should be a hole in the middle. Just fine a alen key that fits in the hole and turn it around and then turn it on should solve your problem