Please help with scope creep with no amendment

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

Ngl i'm in a difficult situation and trying to figure out my next steps fr fr.

scope creep with no amendment. I've been dealing with this for about 13 months now and the situation isn't improving.

The contract was signed 6 months ago. I have a copy of the original agreement. The total amount in dispute is approximately $42,000.

Has anyone been through something similar? What worked for you?