Barons Durban pathetic service delivery!

My epc light came on in my car in the last week of May 2021. I had booked the car with barons for the 3th of June as that was the only date available, and which literally took me from 07h30-12h30 to get done as the only person who does the booking was apparently busy. Even though im a health care front line worker is still able to take the time and make the call. Barons is too busy to answer their calls. The car went in on the 3rd of june 2021. My service advisor Mr yogen Naidoo explained all the necessary steps and that id be contacted once the problem was diagnosed. I later on got a call from Mr Naidoo to state that the sparks plug needed to be changed and asked me if i wanted to go ahead with it. I dont know much about cars but from the knowledge i know i felt that to be very strange. As my car went in for a service to Barons Durban in September 2020 with a mileage of about 76000km and they did a major service on the car and claimed to have changed the sparks plug at that service and i was charged R1600 for the plugs. Now in June 2021 when my mileage is 81500kms the spark plugs is gone...... as irritated as i was i decided to just let it be as i needed my car for work as its my only form of transportation. So agreed for Barons to go ahead and i was charged R2600 for the change of sparks plug which was clearly not changed at the service but i was charged for it. This clearly shows how deceitful Barons is. I will never refer anyone to go there. One would think sending your car to the agents is best but they are a complete waste of time and money. I would rather give the job to an rmi approved place!!