@HemmoHohto: did you try phoning for an RMA number? I had no problems getting one once I got through they were quite helpful on the phone, although I appreciate this may be more expensive if calling from another country.
The only annoying thing was they said DPD would collect on monday and someone had to stay at home all day long to wait for them to turn up... only they didn't. They didn't show up until tuesday, so thats nearly two whole days sitting at home waiting for the doorbell to ring, we weren't best pleased, although I appreciate this is a problem to do with the carriers rather than OC.