Client that is sick and tired!!!!

After being a client of dial direct for quite sometime, it is a struggle each and every year when debit order date falls on a public holiday the deduct the payment earlier. Which means it bounces and I have tonpay the banking costs. I have soecifically asked them more than once to change it to deduct afterwarda and not before and still they dont respect the issue at hand. I have received a message now stating the will deduct my payment 3 days earlier this month with no reason what so ever. I want to understand the reason behind this we phoned immediately when we received the message and now they tell me they cant di anything. I think its time to move my clientel somewhere else as this is continuous issue of *********** people or either death people working with telephones. I am sick and tired of this.