Think about how much a lawyer costs per hour.
Then think about how much a glovebox costs.
Is there any point in spending $200 on a lawyer to replace a $50 part?
Obviously not.

If the "mechanic" is unwilling to pay for a replacement, then vote with your wallet and don't deal with the guy anymore.

In the whole context of life on earth, a $50 part is not something to sh*t a brick over. There is certainly no reason to sue for a @&f*ing glovebox.