Fnb unpaid debit order charges

I am again so frustrated with this bank. I have been charged over 2 days R440 for unpaid debit orders. The money I must transfer from my savings account to my smart account. The one debit order was for R90 which they have charged R110 unpaid. During this time of COVID 19 they still been *********** their clients I wont pay that R440. My account can be in a minus for all I care. They send me a SMS last month stating unpaid debit orders will be charged R20. I dont know where this R110 is coming from. ****** *******. I'm really fed up.