Old Characters from Frostmourne Missing

Hello, I understand that a new season started on Frsostmourne since the last time I logged into my account. I recall that those characters were going to be transferred to Icecrown, but it seems that they were lost / deleted. This is probably because it has been about 1 year since I logged in. Are these characters gone for good? Is there an in game command to access them? I would appreciate any advice if anyone can help.

I had several level 80s and would prefer to pick up where I left off rather than releveling if possible. Thanks!

For time you've spending writing this generic post, you could scroll sub-forum a bit and already find solution for your question and play characters on Icecrown.
My account > Services > Frostmourne S1

" I would appreciate any advice if anyone can help."

Thank you for your help.

If you didn't notice how i've literaly told you what to do to get them back - nobody would be able to help you.
But not so surprising anymore, OPs tend to read only first line, Thorbjorn and Ohie just much higher tolerance to such guys)