“You have entered an invalid number “

Dealing with bureaucracy is never fun. Once you’ve found what you believe is the correct telephone number to call, you first must ensure the office is open.  This excludes weekends and holidays; and never attempt a call within 5 minutes after the recorded opening time. If you connect to a government office for example it is assured that “All of our agents are currently busy; your expected wait time is between 10 and 20 minutes “. Even if you are requested (by a recorded message) to enter banking or social security detail, you’ll be asked to repeat it later (assuming you’re not first told “You’ve entered an invalid number”).