It really depends the exact wording of your insurance contract and contract with the dive operator, especially of the compensation clause if present.
Even if it's not worded, I would think that the risk of a customer getting DCS and cutting the trip short should lie with the operator. It's a business risk. It would be unfair to let the other customers bear this risk. Logically, some compensation from the operator would be fair, especially if the operator wants to build a good reputation and goodwill among customers.
The operator may have insurance which covers such scenarios too.
If nobody is willing to compensate you, you may have some recourse through a civil suit to the operator (or other parties), but you'll have to consult a lawyer to get advice on that and decide if it's worth the hassle and cost.
Do let us know the outcome after you speak to your insurance provider or operator. It'll be a useful case reference for others.
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