Billing and pro rate billing

<p>agreed to pay R800 for february month special. Got the bill of R1500.00 for end of March.</p> <p>installed the device and activated the account the <strong>20th febraury 2017.</strong> Billing is from the <strong>9thMarch - 9th April!</strong> FOR 18-20 DAYS OF PRO RATA..telkom bills me R700,00 CALL CENTRE AGENT says it EXCUDES VAT and SPECIALS DISCOUNT OF R350!!!!!</p> <p>IM FURIOUS!!! first month of billing and started off like this??? how do i cancel?></p>