Well, the receipt is your ticket to those privileges, otherwise you have nothing more than a second-hand item. The employees are making minimum wage, employees are generally nice people who want to help, treat them kindly. An item may not be in stock. The Manager is not God. Do not expect a manager to fire someone, do not expect a million dollar refund because you feel you deserve one, do not expect sunshine on a rainy day.
Many stores operate on a reward basis for outstanding customer service.
Let the team know, it is in your best interest. Furniture comes unassembled. It also comes in a very large box. Do not buy furniture if you own a Volkswagon Bug or if you do not own basic tools for assembly. Technology becomes obsolete.