No problem, October victim,
we just try to find more details for other potential victims. if you dont have them, we may hope that someone else will report this scammer.
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If i've changed the URL and username on my facebook, is it possible for them to find me again?
If you dont use the same profile picture like before and you change the url and username, little chances for the scammer to find you. Not just on Facebook, but on every single place where you have met the scammer online.
Usual, we advice our members to change email adresses (if is possible), usernames, passwords, phone numbers, bank accounts (if the money was send through Paypal or bank account), everything that was used with one scammer, because this one will sell the details to another group for re-use with a different approach.
Even so, be careful with unknown persons trying to contact you online and dont provide your real life details if you have not met the person in real live.