Unfair prorata billing practice

I have received no response or feedback on this matter. Reference number is AI ********** . If I withheld payment , my services would have been suspended, this is bully tactics.

...I received my first Telkom bill and do understand prorate billing, but do not agree with the latest invoice/statement. I started the service on 1 August 2017 and was billed prorate from 1-3 August and full from 4 August to 3 September 2017. R599 (full subs) + R202.64 for 3 days. My calculations indicate that I should be charged – R658.10 (calculations below) R599 x 12 = R7188,, R7188 /365 = R 19.70 per day (amount rounded up) 3 days x R19.70 = R59.10 Can you please rectify my account and credit the overcharges. I called the call centre yesterday and spoke to 4 consultants - Customer Service, Sales (who confirmed that the Telkom Anytime Extra is part of the promo) and billing (who does not assist with Billing disputes).