Help and get rewarded

I'm looking for a website that I signed up for back in 2009-2013 because someone owed me money and they wanted to pay me with Bitcoin. They sent it to me through that website.

Only thing I remember is that the background was black. (altho could be wrong).

Used email and pw to log onto the site where you can send or receive Bitcoin. Send to one another etc.

Help me find it and you get a reward.