美国采购需求：三头肌绳、阻力带手柄、人体工学哑铃、地雷架、附件配件、杠铃地雷球

I recently purchased your stair stepper that was delivered on January 29, 2026. I only got around to assembling it today, and I was disappointed to find that the monitor, which is essential for tracking my workout progress and time, was missing from the box. Given that I opted for assembly, it's crucial for me to have this component to fully utilize the product. Could you please assist me in resolving this issue? I would appreciate it if you could send the monitor box to my address. It would be great to hear back from you through email or a phone call regarding the next steps to take. Looking forward to your prompt response!