Faulty AC Function on 2000 Cadillac Seville

AC does not produce cold air an drivers side. Dealership failure three times. Two actuators and $800 did not correct. Low refrigerant & refill corrects symtom temporarily. No AC oil leaks found. Any good info out there? Frustrated, broke and desperate. GM cust serv usls.

Asked by for the 2000 Cadillac Seville