warranty claim denied on technicality — what are my options?

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Illustrative scenario prepared by my practice.
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Hypothetical question

On mobile so apologies for formatting. Looking for advice on a legal issue. Here's what happened.

warranty claim denied on technicality. I've been dealing with this for about 8 months now and the situation isn't improving.

The contract was signed 6 months ago. I am not sure I have the original signed copy. The total amount in dispute is approximately $54,000 tbh.

Am I overthinking this or is this a real legal issue worth pursuing?