The first whitening in September was okay, but sin...

The first whitening in September was okay, but since January I have been trying to get a second appointment and no one answers. The email address does not seem to be up to date anymore, the two given phone numbers lead to nothing. After umpteen tries I was finally able to reach someone, made an appointment and then stood in front of the locked door at the agreed time and of course could not reach anyone by phone. What a waste of time.