If you changed your password to the pattern in question within 72 hours, you could still unlock your phone with your old password.You just need to get the pattern wrong once then a prompt should appear that will allow you to use your old password.
Probably wrong, but your phone could be an international model.After the update, it got the same software as S. Africa's variants which don't support eSIMs. So I guess that's how you lost it路