We sincerely apologize for this, Alex. The ½” furniture board box uses an encapsulated construction that should be held together with a durable glue and added staples. The finished result should give you a long-lasting result, and the separation you have experienced is certainly not to be expected. All of your Hampton Bay cabinetry is covered by our Limited Lifetime Warranty, and our Customer Care Team would appreciate the opportunity to learn more about your experience so that we may work toward improvement. We are also, of course, here for you for years to come should you ever have any questions or concerns. The team may be reached by phone at (888) 578-4009 or by email at homeproducts_cc@woodmark.com if you would like to share more pictures.
We understand how critical timelines are, and your need to move forward immediately. If you were to reconsider keeping this unit, though, please be sure to reach out to your local Home Depot as quickly as possible to discuss your return or reorder options as part of their return policy. It is our hope that you are able to create a finished result that you can rely on, and we thank you for choosing Hampton Bay to be a part of it.