keeps calling me and not interested

I called back number (03) 9380 7774 reached IVR for a company called Australian Garage Door Parts.

no message called when I was out.
http://ozchineselearning.com.au/ this is a link on Google search
Amp Electrical Solutions
Electrical engineer in Campbellfield, Victoria
Address: 7/146 Northbourne Rd, Campbellfield VIC 3061
Phone: (03) 9380 7774

Had these people out two years ago for our garage door. Constantly ring (sometimes 2 or 3 times a week). Have spoken & asked to be taken of the customer register to no avail. I have them blocked on both mobile & home. Will not take no for an answer.

unsolicited call regarding the garage door. Called even though we are on the 'do not call register'

This a for garage door parts....I didnt ring to get any bits as my door works fine...
I have an answering machine and yet they chose not to leave a message...bit rude I think.