Letting the price reflect those costs is the simplest thing that might work.
Other pricing strategies like subscriptions and packages might also mitigate the cost of chargebacks.
Winning chargebacks is the most complicated thing that might work.
Good luck.
Won't packages increase the risk meaningfully though? It's actually something I've hesitated rolling out because of exactly this risk eg. 5 transactions for 100$ where 1 of them gets a chargeback is a much easier hit to bear than 1 trasaction for 500$ getting the hit?
I guess from a chargeback rate "%" perspective it might be better to have just 1 large chargeback instead of multiple small ones... but then at the same time it also reduces the evidence I can submit to Visa / Mastercard / banks that this person actually made multiple bookings.
I mean think of chargebacks like a money back guarantee and the price as a way to offer that value to your customers.
Heck you could offer a money back guarantee as a way of segmenting the market.
Then your customers might talk to you rather than their credit card company. And your chargebacks go down. You’re still out the money, but your relationship is stronger. I mean, contesting a chargeback isn’t doesn’t delight anyone. Including you.
Raising prices is better than reducing costs. Always.