I wish u were in pindi i mean i could have reffered u to a guy i mean us ney kaam tu apni marzi sey karna tha but for a season he gives a warranty agar gas leak ho ya cooling kum ho tu he will do it for free .
Problem jo mujha nazar ata haina system heat ko sahi trah nahi cool down kar raha means ur condensor so it the load increases it also increases on ur pipes and condensor and kahhe na kahe sey leak hojata hai.
Ask AC wala to give 350 or 400 Pressure to check leaks waisa u can also get ur condensor checked and install condensor of latest model Cultus (Multi Aisle) Works gr8.