All right. Please try to contact the in-game customer service through your Account settings of the game using the Customer Service option for further assistance. If your issue is not resolved through the customer service, you can let us know.
Please check through your Google account settings > Security > Your connections to third-party apps & services and check if PUBG MOBILE is available there.
Please make a new video recording of the issue you are facing when trying to link the account, @pubglover191. If there is any personal information, make sure you hide it before you send the video recording here.