Premium Charges are bad enough and the calculation of same, requires a degree in advanced mathematics. However, after getting off the phone to them I feel there is another injustice.

3 weeks ago my total charges generated over the lifetime of my account dropped below 20% of my gross profit and so I incur a charge. A week goes by and I drop $5k in a week.
My total charges generated over the lifetime of my account are now above 20% of my gross profit. So at that point in time looking back I never should have incurred a premium charge as circumstances have changed, therefore in my mind the previous charge incurred should be reversed and my account credited back?

NOT the case with Betfair. Once they've taken it off you it's not coming back!

This seems an injustice, and I made my intentions known. It's no different to the ATO. They tax you and later on you find more deductions than you previously lodged, resubmit your return, they agree and the tax is refunded.

Anyone had experience with this or a knowledge of consumer law?