What's the deal with apple Pay dispute with merchant?

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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'm dealing with a situation and need some guidance.

Apple Pay dispute with merchant. I've been dealing with this for about 7 months now and the situation isn't improving.

The amount being held/disputed is approximately $10,650. I have tried contacting customer support 4 times with no resolution.

What's the typical outcome in situations like this?