I can sympathize with your plight, OP. I had a problem with them last year and created
a thread about it in the Scam Exchange section, after which I notified their customer service department that I had done so. My problem was fixed, except for an extra amount of bitcoin (IIRC) that I sent for a reason I can't remember but which I wrote about in my thread.
And Changelly is probably the
best instant exchange out there and yet their customer service is so piss-poor, can you believe that? I think ShapeShift might be comparable, but I haven't used them in years and even then only once or twice.
I don't know what coin you were trading, but if it's possible I'd look for a real exchange that lists it and use them instead. Good luck, and sorry you got screwed by Changelly.