Originally Posted by ISTFlyer

I think you are out of luck. Even though you live in Italy, your ticket does not involve Italy so TK would probably deny your refund claim. You could simply call your travel insurance ( if you have one ).
And, the sales offices in Italy would be able to help you with this booking, as they should be expecting a high number of calls and e-mails at the moment, it would be better if you visit them in person.