They sent me this e-mail:

Dear XXX XXXXXXXXX,

In order to continue enjoying the world of benefits Miles&Smiles has to offer, please visit your nearest Turkish Airlines sales office along with your ID document or passport.

We hope to fly with you again soon.

Sincerely Yours,

Alican K.
Elite / Elite Plus Customer Representative

TURKISH AIRLINES INC.
Customer Contact Center

The problem is, in WAW Airport office they have no idea how to help and the say they have no access to Miles & Smiles programme.... What a pathetic airline...