This user uses multiple account names (German SEPA accounts and Moneybeam). At least one of those account got blocked by the bank for unknown reasons. We suspect he is doing money laundering that is why there have not been chargebacks yet (not stolen account, so no victim who got robbed). If you have traded with him please PM me a screenshot of the trade details and the json data. You can search for his onion in the trade history.
If you get a chargeback request from the bank please accept it and get in touch.
There are also some indications that Transferwise is heavily used by that scammer or group. It is not unlikely that it is one person behind all the SEPA scams we have detected yet. We will likely block Transferwise completely as it seems to insecure.