You get hit on, you aren’t interested, they don’t get the hint and ask for your number.
Give them one of these!
605–475–6961: Hogwarts Admissions Office Hotline
505-503-4455: Better Call Saul
605–475–6959: Bad Breath
(646) 926-6614: The Mary Sue Rejection Hotline
(719) 266-2837: Call and Oates, which lets callers pick a classic Hall and Oates song to play.
(605) 475-6968: The Rejection Hotline, which tells them nicely, that you are not interested