Billing department

I did my upgrade 25th august 2018 was due, and my bank account was already debited for august period invoice. When I received my September 2018 invoice, old august amount charged, and a new amount for new devices(upgrade) charged twice an amount of R399.00x2. When I spoke to Themba at Telkom told me to visit branch where I collected my devices new upgrade. Why must I visit a branch and why was my account billed double. Because month of August was paid. Why are they charging me for new devices twice and from 1-31august 2018??? Im always having this same problem and issues, when its my upgrade. Cant Telkom do something about this poor and pathetic services rendered for over years now. Im a loyal customer for many years, and Telkom dont even worry about their customers/clients.

Update my statement, and resend back. If my bank account will be debited with wrong amounts this will be escalated to my attorneys for bridge of contract.