You wouldn't have filed an FTC complaint, would you have? Since you were refunded in full, you have no cause to complain. You wouldn't have been that dishonest would you?
Gosh, I wonder who else is not a customer that filed a complaint... anyone else want to admit it?
If all the information given in the FTC complaint is truthful, then there's nothing wrong with filing an FTC complaint. The FTC is interested in all sorts of complaints.