WOW... I also had a very nasty conversation with Tallinn Eurobonus service for the US yesterday. A leg on my award booking was canceled, they were not very helpful at all when I tried to change the routing to get to my destination... Very rude.
By calling the Norwegian number, it worked like a charm!
My advise in situation like these, write down the name of the person you talk to and record the conversation if it starts to get nasty.