Breach of Contract: Age Discrimination

Sorry for the wall of text. I'm dealing with a situation and need some guidance.

ghostwriter wants credit. I've been dealing with this for about 3 months now and the situation isn't improving.

The contract was signed 13 months ago. I have a copy of the original agreement. The total amount in dispute is approximately $123,000.

What's the typical outcome in situations like this?

I've dealt with this before.

In my case from what I've heard, it took about 1-3 months to resolve. The key was escalating to a supervisor/manager honestly.