OVER A YEAR FOR PAID UP LETTER!!!

BEEN WAITING OVER A YEAR FOR A PAID UP LETTER TO BE MAILED TO ME. I KEEP CALLING IN AND GET TOLD IT WILL BE MAILED TO ME BUT IT NEVER DOES. PLEASE CAN YOU SEND A PAID UP LETTER. IM SO SICK OF HAVING TO CALL AND WAIT FOR HOURS ON THE PHONE WITH YOUR *********** CALL CENTER AGENTS. I JUST WANT PROOF THAT I SETTLED MY ACCOUNT WITH YOU