Limitation of Liability Clause: gym won't let me cancel membership

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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

On mobile so apologies for formatting. I'm in a difficult situation and trying to figure out my next steps.

gym won't let me cancel membership. I've been dealing with this for about 4 months now and the situation isn't improving.

The contract was signed 23 months ago. I am not sure I have the original signed copy. The total amount in dispute is approximately $60,000....

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