Do you remember if it said anything else? Also, are you calling him from your contact list? Try dialing the # directly and see if it's the same.
All it says is that the call cannot be completed as dialed and then gives me the announcement. Also, I did try to dial the number and still got the same result.
You can not call tech support from your own cell phone. (Customer service you can) But I am sure they have a friend, family member, work or a store nearby with a phone they could use.
To the OP, Are you having the issue when only in one location or does it occur anywhere?