Poor Service/Empty promises

So cell c calls me on the 27th of December promising me a paid up letter(old song of theirs). I understand it was holidays but there were working days in between it's the 6th of January a new year and nothing had come through yet,guys please man this is getting ridiculous now,since November I've been promised a paid up letter it's a new year and still nothing. How long does it take to receive a paid up letter and get your name cleared. Let's do our jobs people. Someone is going to call me again and promise to send it but no deliverance.