by saying that s/he has sent me 1.1 eth to recover refund transaction fee
I read that in your lending topic just before you opened this accusation, and instantly thought it's suspicious to send more than asked for.
Caught before sending. Edited OP.
That means you used the wrong flag:
shasan alleges: Maxwell20 violated a casual or implied agreement, resulting in damages
I'll take this to theymos' Flag topic (see
here), it doesn't seem right that a failed scam attempt can't have a scam-flag until the scammer succeeds at scamming someone.