Just to clarify. You're looking for Stripe to transfer card numbers out of it's vault into Chase's. Stripe is willing, but Chase wants it done a specific way which Stripe finds objectionable?
Chase needs the cards in a specific way but without more information it's hard to make the claim that's the only way acceptable by law.
If Stripe is unwilling to do extra work with Chase to get cards exported, that doesn't seem to be "refusing to transfer credit cards to another merchant per their policy".
Can you provide some more information on what part of the transfer they object too?
It still sucks to not get a clear answer, and not show up for phone meetings when this has been going on for at least 6 weeks.