RCS STORE CARD APPLICATION GO WRONG

I have app**** for a RCS store card on 12/10/2022 and it was canceled on 13/10/2022 due to the fact that I have changed from one bank to another. I have also attached bank statements of my previous bank account in order to proof my income. According to their reason its because my new bank account isnt older than 3 months, but if one have a look at the requirements for a RCS store card this reason isnt listed as a requirement. Its just very unprofessional to do a credit check and everything just to cancel the application for this silly reason. I still cant see the logic in this decision. A agent even called me to clarify something, but not once did she indicate that the new bank account might cause problems. Maybe a senior accounts manager can give me call to explain where this requirement comes from. Im really not satisfied with the manner in which this application were delt with.