Making it impossible to fix a debit order account nr

I am trying to update my details BUT 1) I have to hold 10 minutes to get through to a consultant 2) I have to go through the most ridiculous set of security questions ever to try and prove that it is me 3) The account nr for my debit order is incorrect - not able to correct it and have to "put in a request" to have this changed as the application form is missing a digit I AM TRYING TO TO FIX A MISTAKE AND YOU MAKE IT IMPOSSIBLE. The "statement" of "the ease of setting up a debit order" is waaaaaaaay overstated and clearly you have no understanding what it is to make something easy. Go on - try to collect the money from the incorrect account going forward. I will keep on paying with EFT and if you charge me costs I will settle my account