The 'part' that keeps spinning, You mean the hole for the tie-rod end?
Sleeper has it right. You need to keep pressure from the bottom of the tie-rod upwards so it locks in hard enough to let you loosen the castle-nut that holds it on.
OR, you can use a shot of paint on the other end of the tie-rod, loosen that end and keep turning until it comes out. Then when You have it all fixed, you can screw it back to the paint mark on the threads.
It can be a real pain, but unscrewing it can save tons of time. You just HAVE TO get it back to where it was or it will be alignment time.
And another thing. Ya gotta understand that peeps are still dealing with Christmas and such, We won't leave you hanging too long.
E