Will I lose my LINE account?

Will I lose my LINE account?

I've lived in Japan a year and used a Japanese phone number to make my line account, however I'm moving back to the UK and will lose my Japanese phone number tomorrow.

I've registered my email and linked with Google for the account, but I cannot transfer to my UK phone number, so what will happen to my account?

I've registered with an company who do recycle phone numbers, so if the new owner registeres an account with the number will I be unable to use my line account?

Is there anything I can do to save my account? I don't want it lose all my contacts! If anyone can help please let me know!