Debiting my account too early! EVERY ****** MONTH

Every month it's the same story... My bank account is debited on the 27th or 28th. I phone vodacom, tell them I only get my salary on the last day of the month, but they don't care...<br> <br> Every time their debit order goes off, and there is insufficient funds, I get penalized with a R138 debit bounce<br> <br> This is unacceptable, and I demand that vodacom either give me the credit for that amount, or refund me. AND CHANGE THE ****** DATE!!!!! 31 Jan, is the end of the month... not 28 JAN, according to my landing page on vodacom app, the date shows 31 Jan 2016, so why do you debit on the 28... do you have some sort of retard working there that can't read a calendar?