Refund question

Hi! I am from Ukraine. I was charged when buying an app faulty, since I have clicked for the free trial yet I was charged nethertheless with the maximum amount. Developer doesn’t reply, Apple support is not available. What shall I do to refund my money? Please advise how to contact either Apple support or anyone that can resolve my issue. No one is replying and money have been taken from my account immediately already.

thank you!