Defective MacBook, disgusting service

I bought a new 2018 MacBook Pro 15in 512gb laptop in June as they launched (for that ridiculous price tag). But I did it because my last MacBook was great, and they promise quality of the build. The laptop was defective since I purchased it (having issues with the speakers, microphone and keyboard). The laptop has now gone in for the 3rd time for them to fix the keyboard. After two weeks of silence they finally responded saying it hasn’t even been assessed yet and it’s in the queue. I booked this unit in back in October so that I would be ahead of the queue, yet they continue to just drag their heels. I start work on Monday (as a consultant), and literally don’t earn money if I don’t have my laptop. Disgusting service, and having been an avid Apple MacBook user for 4 years, I can say that their sloppy service and disregard for selling defective products has all but turned me off the brand!!!