failure to complete request to add a signatory

My request to add a signatory was only partially attended to and after the second caller from the bank I completed the paperwork that she wanted me to complete and returned it. I was told the issue would then be finalised within 24 hours after submitting the forms and until now 72 hours later I have not received any confirmation that the case has been finalised. This has caused significant delays and strain on our finances due to this delay. Whenever I try to call the business help desk I get transfered from pilar to post. It would help if I were to have a person dedicated to my case to contact and deal with