How to fight back on HHG move claim?

This was my first time having the military ship my stuff for a PCS but this time I transferred to Hawaii so I had to use them and my couch when it got here was taken apart (when they took it they did NOT take it apart) and they didn't bring the screws they took out to even put it back together and the electric motor was not working when I got it back as well. So not only did I have a couch that is 1 piece broken into 3 I don't have the screws to put it back and it doesn't even recline with the buttons anymore and it will randomly spring out when sat on. I bought it used on FB marketplace for 500$ a few years ago so I have no clue the brand new price and did my best when submitting my claim with couches with links that looked pretty similar, and they offered me 20$ for the screws as the motor "could not be verified as travel damage". Do I just submit a counter claim or do I escalate this because offering 20$ for something I paid 500$ for seems ridiculous.