Is there somewhere to lodge a complaint at Dell Outlet?

Despite the best efforts of the sales reps over at the Dell Outlet, I've had a pretty infuriating experience over the past few hours. I've tried calling and asking for both complaints and order support, but they are both apparently closed. No way to leave a message, just told "this department is closed" and got disconnected. I've tried reaching out via chat, which says it's open until 10pm ET, but was closed by 8pm.

Does anyone know some alternate route of getting in touch with them? Or do I just have to file a service ticket and wait the up-to-24h for them to get back to me?