Is this a normal Tesla support experience?

I got my first Tesla (MYLR) at the end of August. 12/1 the cameras, GPS and sensors all stopped working. Tried calling as I thought it was software and got a tech who told me to try an update (that hadn’t been there before I called) and then couldn’t get off the call fast enough. Update didn’t work. Made an appointment for 12/27, had to wait 3+ weeks, and today I got an update that the appointment is now 1/14 because they couldn’t get a part! Is this how Tesla service and support always operates? Serious question as this is my first experience.