Mercedes Benz Clearwater: The worst possible service experience.

My vehicle was booked into Mercedes Benz Clearwater, for a B-service, on Tuesday June 17, at 07:00, after making a telephonic booking. Three work-days later, on Wednesday afternoon, upon phoning the service consultant since they never call the customer to inform you about progress of the service, I was told that the vehicle would be ready for collection at 17:30. However, upon arriving at the dealership, I was told that the vehicle is still in the workshop and won't be ready until Friday. Then Friday morning after arriving at the dealership per their advice, I was once more told that the vehicle was not ready since they were still expecting certain parts. I took back my car for the weekend, with the arrangement that I would return the vehicle on Monday morning so they can complete the service. On Monday I was told that the parts arrived at 9am that day, and that my vehicle would only be ready by the end of Wednesday. On Wednesday, at 16:45, I called the dealership to enquire about the status and was told that the vehicle was still not ready since they had ordered incorrect parts. I then requested to speak to the service manager. While holding on the phone, the service consultant cut me off, and by this time none of the dealership phones were picked up. Mercedes Benz Clearwater has now had my vehicle in their workshop for a total of six and a half days and counting, and they still have not completed the work. This is the WORST POSSIBLE service that one can dread having to receive at the hands of any motor vehicle brand. I have been misled, **** to, and deceived by the service consultant about the service work on my vehicle.