Gmail Account Hacked and TikTok Access at Risk After Takeover

I am having a serious problem with my Gmail account and its password. My Gmail account has been taken over and I no longer have access to it. This situation started very recently and I cannot log in or use my Gmail account any more. My personal information and other connected services are at risk because the account is not under my control. I request that access to my Gmail account be restored to me and that the necessary security checks be carried out so that only I, as the real owner, can use this account. In addition, the TikTok account linked to this email is very important to me, and I want to stress that losing my Gmail access directly affects my ability to manage and protect that TikTok account as well.