Nintendo DS game broken

Hey there,

I have a Pokemon Heartgold module here from my past and it unfortunately is not working. In my past I tried to fix it and probably broke it even more.
Now I have the problem that the gold contacts on the module where the game comes in contact with the DS are nearly scraped off entirely.
Is there a solution to restoring the gold contacts somehow again? Like sodering them again?
I appreciate any reply.

Greetings from germany