I did a status match from Aegean gold card in April 2016. After a year I had roughly 18k in status miles but only 10k of those were on TK flights. So they dropped me to Classic Plus in April 2017.
I appealed three times, each time it took them between two to three weeks to respond and deny my appeal.
I give up. I think it's deceptive of them to change their language during the process and not honor that language.
Given the poor customer service and lack of clarity I strongly recommend not relying on their program. I live in Istanbul and like flying on Turkish Airlines flights, but the loyalty program is horribly managed. Better off using another *A loyalty program.
Hope that helps others who might run into the same issue.