Open letter to the person I just tried to call

Dear Sir,

I just tried to call, but you didn't answer so I left a voicemail message asking you to call back.

In this situation, it is usually the norm to, once you have received the message, call me back.

So why bother going to the effort of sending me a text telling me why you couldn't answer my call and then ask me to try calling you again??

I called you. The ball is now in your court. Money obviously isn't an issue because you spent 25 cents asking me to call you back when, if you had just called back, this whole thing would have been sorted by now.

Sincerely
David.