Very disappointed 😔😥😢😭

On Tuesday 8th Aug 2023 I have organized tow truck to drop my vehicle in this dealership since it's primary battery was dead and its annual service was also due. So I called in, arrange for the drop off for the service on Thursday morning. I actually needed a battery purchase from this dealership to simplify the situation since I was out of province but unfortunately they didn't have battery on stock and I was told the waiting period of the order is about 21days sincewell is from outside the country so I couldn't wait any longer but to get the battery from dealership locally so my car can get its service done. On Thurs morning around 8am when I get to the Mercedes so to get the old battery or at least its size to avoid purchasing wrong battery, I was told to wait as the agent was still busy booking other vehicles in for service, to my surprise I wasn't been attended to for 2+ hrs, as of till 10:45 or so, that's when he then attend to me for the battery sample and he then told me That my vehicle will not be serviced today as it's already late, it can only be attended to tomorrow as in Friday. I have never felt so undermined ever before as in how the Mercedes did recently. What I was sure of is that I am not gonna spend funds for accommodation as if my car is in need of major service instead it was just a minor service that could take 1hr. The service agent who attended to me didn't seem to be giving a damn at all, instead it's not gonna be done today regardless of towing the car into their dealership 2days in advance so to simplify situation but nope, it was just a waste of time and money for paying all the towing company. I had no choice but to request my vehicle back so to make a booking somewhere were I would be treated with dignity. That's when they decided to attend to my vehicle the very same day afternoon around 2pm, they called to notify me that it's gonna be ready at 4:20pm for collection. When I collect the car, he told me it shows auxi****y battery signal on the dash, I mean is already 5pm but it could be because the car has been on flat battery for long so it could clears on the way. To my surprise my car didn't switch its Stop&Go function at all, instead it was switching off the engine completely at the robots 🙄🤔😏😔😢 and mind you I am driving back to limpopo that evening. When I call Mercedes the following day, I was told to bring the car back, just imagine all this travelling costs and time consuming driving back and forth for the service is could have done like any other clients did, What annoys me and again disappoints me is that these people doesn't seem to be valuing me as their client because I mean this car was purchased here, been serviced here for years but regardless... I suspect they gave me all this horrible treatment since the battery was brought from outside. Now I have to go back to Mercedes so to get my car back to its original, so stressed.