avon disappointing service

My Name is Hennah Sebolai, I am one of avons biggest sellers and have been for several years. The last few orders I have been let down by AVON for missing items, and they refuse to refund me or send replacement items? I dont feel this kind of customer service is fair due to the amount of years and loyalty I have offered them. I would like someone to assist me in obtaining my missing items, or refund me!