If your account was flagged as a protential 2nd account you will need to vet your account from an LG Staff Member.
What do I need to vet my account
If you are an xbox member, and you are "Gold Sharing" you will need to provide a photo proof of your xbox showing your account and the account of the Gold Member you are sharing with . Example https://i.imgur.com/OevjhpE.jpg
If you are a PSN User - you must provide information on any related users you might be connected too