Hi. Welcome to justanswer.
Do you have a Samsung account?
Enter the wrong password ***** you get a message to try after sometime
You will then get an option to unlock via google at the bottom of your screen
How many times did you enter the wrong password? If you enter an incorrect password, pattern, PIN or fingerprint enough times (usually 20+) on the lock screen, you'll be prompted to enter your Google Account credentials, which will unlock your phone.
Oh then you have only one option left Neil. You will need to hard reset your phone but it will wipe off all the data.
If you had Google account or Samsung account, I could have unlocked your phone remotely but since you don't there is no way to bypass this security