Styles for Less Assistant Store Manager interview questions

Met with the District Manager to discuss my application submitted online for Store Manager. Was a brief interview after a few questions she decided to offer me an Assistant Manager position, where I could train and then soon be moved up. I accepted. She told me to meet with the Manager at a different store to complete the new hire process, which I did. They requested an old pay stub be brought to them before I could start. I complied, then NEVER heard back from them. Left several messages, etc, very unprofessional. Wouldn't even return my pay stub from my former employer.