i didnt get the refund, can i add flag on him? he was never going to refund anyway, 60 euro is too much for him

Yes of course... go here: https://bitcointalk.org/index.php?action=trust;addflag=2813711

Select the: "This user violated a written contract with me, resulting in damages." option... on the next page, select the date as appropriate and use the link to this thread as the reference (https://bitcointalk.org/index.php?topic=5275415.0).

Advise once you've created it, so other users can then support the flag.

He is already negative rated by two members.

Flags are better... they show up warnings to newbies and users that are not logged into the forum...