How to contact aol fraud department?
I think you should write to the Consumer Financial Protection Bureau. If I am not mistaken, they are the ones who investigate the cases of fraudsters. Here, for example, a scandalous case T3Leads where the scammers directed their consumers to bad deals, as written in this authoritative source
(800) 307-7969 or call any aol number and use the transfer code # 9930 or ask an op to transfer you to fraud.
If it is about a account you have I would call 1-800-827-6364 to start, then go from there.