defective air conditioning???

Hi people, have a problem, maybe someone can help me. So I got my V50 to the air conditioning service about 1.5 months ago, because my air conditioning system didn’t work properly anymore. There 530g of the air conditioning was filled up (or exchanged???). (Stand at least on the sticker I found in the engine room today) At the beginning (1.5 months ago) the air conditioning worked very well. Now only warm air comes up. What else I noticed is this; if I press the button for the air conditioning automatic (the big round) then the air conditioning automatic can no longer be switched off (the small green light does not go out). If I turn to the big button then the blower speed can be regulated quite normally. Can the air conditioning no longer be because something is leaking or is a software error? Would you be great if you could help me because I would like to go on vacation soon. (with working climate :-D) lg Jan