Poor service and lack of communication

I BELIEVE THERE IS AN ACCOUNTING ERROR WITH THE CURRENT ACCOUNTS AND THE BILLING AMOUNTS THEREIN..I AM BEING BILLED A FULL MONTH'S AMOUNT OF R 249.00 WHICH IS CORRECT. I AM ALSO BILLED R 217.17 FOR 27 DAYS. AS I HAVE ALREADY PAID FOR ONE MONTH AT R199.00 THE CALCULATION SHOULD BE R 249.00 MINUS R199.00 = R50.00 DIVIDED BY 31 DAYS MULTIP**** BY 27 DAYS = R 45.55.. THIS THEN REFLECTS THE CORRECT SHORTFALL FOR THE UPGRADED PERIOD./YOUR ATTENTION TO THIS ANOMALY WILL BE APPRECIATED AND THE ERROR THUS AMELIORATED.LEON BREDENKAMP