Radiator was replaced,now my ac blows cold then stops & blows hot or not at all

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I have a Volvo XC90 awd 2004 T6 or T8. The transmission fluid was recently changed cause it was over 178000 miles and I just had the oil changed and all fluids checked, which I keep up with regularly. My vehicle was running great except their was a leak in the radiator so I was having to put coolant in it more frequently so, I just had the radiator replaced and a coolant system flush and their was also a hole in my power steering fluid hose cause it was rubbing up against the belt so I also had that repaired. Now my ac isn't working right. It blows cold air when it wants to but it won't blow cold for long. It still blows air but it is very hot air except today when I turned my vehicle and ac on it wouldn't blow any air out at all yet all the buttons work. So we added freeon to my vehicle and it didn't fix the problem. Also, after I turned my vehicle off and back on, when it wouldn't blow any air before, the ac started working again blowing cold but only for a few minutes and it started blowing hot again. Please help me!!!!