Air conditioning without function

Hi, since January 11 I am on the road with the Fiat Croma. Now during the Denmark holiday we have unfortunately found that the air conditioning is actually without function. So we turn on you and not even at level 4 comes cold air in the car. Remote diagnosis is difficult, I understand. I still want to know if someone already has experience with it and possibly the air conditioning only has to be refilled cost-effectively – or what can it cost me (in about) if there is more to be done? Car is five years old and now 110,000km down…. Look forward to answering. Best regards Flo