Force Majeure Clause Invoked: scope creep with no amendment

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Illustrative scenario prepared by my practice.
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Hypothetical question

English isn't my first language so bear with me. I've been trying to resolve this on my own but I'm stuck.

scope creep with no amendment. I've been dealing with this for about 10 weeks now and the situation isn't improving.

The contract was signed 22 months ago. I am not sure I have the original signed copy. The total amount in dispute is approximately $2,000.

Do I have a strong case? What should my next steps be?