I tried from 2 different computers and 2 different phones as well, the local office, TK contact centre and the travel agent all also tried, all of them got the same message about "operational reasons".

I am generally appreciative of pointers that I may be doing something wrong, and also respectful of some forum members' loyalty to TK, but perhaps in this situation they have fallen vastly short on the basics and even their local staff at the departure City agree, so I'd be more appreciative of assistance in the form of some useful info in gaining the attention of someone objective and accountable at TK.

Also, have TK always deployed impossible circus clowns to respond to online feedback, who try to send you around in circles but never fix anything in hope that the customer just gives up and leaves them alone? That would make them a very "book and hope for the normal" airline...