Air conditioning – need advice

Seat Alhambra Signo 1.9 TDI EZ 01/2001 km 46000 Hello guys, I need some advice. I have been having problems with my Climatronic for several months. When the cooling capacity decreased, I had the system refilled. Then the cooling capacity was again top. After 8 weeks there was no cooling again from one to the next day. System was refilled again at ATU with contrast agent. After 4 weeks no cooling again. At ATU the system was illuminated but no leak detected t. It was assumed that the evaporator was leaking, but there was also too little pressure built up possibly also compressor defective, repair should be carried out at Seat. Then I brought the car to Seat in Aachen and explained everything. After 4 days the car was repaired, allegedly capacitor defective (700 Euro repair costs, no culant as EU vehicle). I could not detect a cooling power when picking up. The Meiter told me that one does not feel this right during the season. The temperature in the outlet channel, which is about 6.5 degrees when the system is working, was not checked. When I was back home, I measured in the garage and determined that the outlet temperature is over 20 degrees. I called the Seatmeister again and told in that. Now I have to bring the vehicle back to the garage on Tuesday. I suspect that now, on good luck, the next component will be replaced (at my expense). Hand have to insist on a free repair or you are helplessly delivered to these auxiliary mechanics. Since I have unfortunately only very limited financial resources, I am now quite depressed (costs up to now over 1000 euros – result equal to zero) Thank you for every answer. Ralf