Solid Build Associates refused to address issue

I'm writing to complain about the setup assistance I received from Solid Build Associates. After paying $414.98 for device, I found that it has a manufacturing defect. I've tried resolving this with your customer service team multiple times, including speaking with Kayli K., but have not received a satisfactory resolution.

I'm writing to complain about the setup assistance I received from Solid Build Associates. After paying $414.98 for device, I found that it has a manufacturing defect. I've tried resolving this with your customer service team multiple times, including speaking with Kayli K., but have not received a satisfactory resolution.