Poor customer service

While my BMW X3 was in its service plan, I alerted Menlyn Auto BMW of a noise at my aircon pump. After they advised me that it must be booked in, to re-gas the system, they told me that if I hear the noise again I must bring the vehicle back. One month later the noise was back and the vehicle 300km out of service-plan, obviously I was now told that the aircon pump must be replaced and that vehicle is out of plan. Conveniently they blamed the fact that I have to pay on BMW SA, while it were either: 1. their poor technical service or 2. Menlyn BMW strategically delaying the replacement of the pump till the vehicle was out of motorplan. Till today I have had no response from them. Subsequently I have taken the vehicle to BMW Waterfall who resolved the matter for me with BMW SA. The service at Menlyn BMW is poor and a feeling of being deceived!!