Poor Service, Taking customers for granted

On the 15th September 2020 I took my car for a service and reported and requested to Michelle that the wipers needs to be replaced as they were scratching the windscreen and also the remote key batteries needed to be replaced. She phoned me at 15:30 saying that they have to keep the car overnight so I will get the car on the 16th the following day. When I picked up the car, Michelle told me that the wipers have been replaced but the remote key batteries were not replaced because they did not see the need to replace them. When I started my car on the 21st September a message popped up on the screen that "remote control replace battery" then on the 25th September it was raining and when I put on my wipers to my surprise, they are not working, the driver's side that was working but making the noise and scratching the windscreen while the passenger's side was not working at all. I don't know what I would have done if it was raining heavily, because I could not see anything in front of me. When I phoned Michelle on Monday, 29 September she just said let me transfer your call to the booking department and no apology at all. I am very disappointed with the poor service I received from Continental BMW not to mention the waste of my time and inconvenience of not having the car for the whole day on the 15th and to wake up early again today to bring in my car again for something I have requested to be done but for reasons not known to me it was not done! I have to spend the whole of today without a car for something that could have been avoided. I mean you cannot expect a poor service like that from dealership as big as BMW. I am so unhappy and disappointed with their poor service.