mwakabaga

Hi,am facing problem of Aircondition,i refill the gas,the compressor tend to work but inside still hot air coming but sometimes cold air coming then it stops ,as if when compressor gets hot then hot air starts to come inside,if i park the car and remain into silence the Cold air starts to flow but once i starts to move then turn turns hot air again.
anyone can assist on this matter?
thanks in advance.