Hi Reza,
We are awfully sorry that you received missing/damaged parts. We strive to provide a quality product and can assure you that this is not a common occurrence. To have these parts replaced send us an email to parts@shelterlogic.com and include your name, mailing address , phone number, model number, a copy of sales receipt, missing part numbers and quantity. We will place your order and send you a confirmation email. We are also available 7 days a week at 1-800-932-9344.
Thank you