Super bad expirience

Took in my car for brake pad service, dealership had no cars to fetch me in the afternoon to collect my car, no one called me to notify me of this inconvenience... I had to spend around 250on Uber to collect my car, upon arrival the car wasn't cleaned thoroughly... On my way back the drivers window malfunctions... Throughout the weeknd I had a car with a malfunctioning windows... On Monday I called in nd after not getting through to the service adviser after 4 times of trying I left my details to be contacted guess what?..No call until an agent called to request a rating after the service.. I gave them a poor rating nd listed my concerns nd issues a week later no call from Mercedes, truly dissatisfied with the serviceost especially because this car is less than 1year old