Worst service ever and l will be canceling my policy if there is no resolution

l changed bank accounts and my new Bank contacted Discovery Invest to provide new details however they keep debiting my order account x 4 which is incurring me additional charges for mis debits: 4 x R130 = R520. l have also called Discovery Invest myself and provided new details however they are debiting the incorrect account. I want this resolved immediately and compensated for the charges.