Very disappointed with Woolworths service

My son who is a graduate adult with permanent employment with a good salary, far above their minimum requirement, 26 years old with no other debt, a clean and good credit record and a very good score, was declined by Woolworths when trying to open an account. He went to a branch with all his required documents, but was informed that his application was declined. No reason was offered. Even when he tried the online application he was declined. When he phoned them they could not give him a reason… but told him to wait a month? Why ?