I Face Account Theft Issue with Clash Royale Supercell ID and Cannot Recover It

My Clash Royale account, previously linked to my Supercell ID under the email y************@gmail.com**, was stolen and the email address was changed without my permission. As a result, all my in-game friends were deleted, and I no longer have access to my player tag or any related account details. This theft has completely disregarded years of effort I invested in building my account.

Because I cannot access my player tag, I am unable to get proper assistance through the in-game support system. I know exactly which devices and locations were previously used to log in to my account, and I can provide this information for verification. The account has been stolen for some time, but I initially did not pursue recovery as I was preparing for the YKS exam. I attempted to recover it once in the past but gave up after failing.

I am requesting Supercell to investigate this case thoroughly, restore my account, and relink it to my original email address. I have proof of ownership and am willing to cooperate fully to resolve this matter quickly.