Nano Computing provided defective product

I'm writing to complain about the training session I received from Nano Computing. After paying $798.9 for tool, I found that it experienced frequent disconnections. I've tried resolving this with your customer service team multiple times, including speaking with Walton D., but have not received a satisfactory resolution.

I'm writing to complain about the training session I received from Nano Computing. After paying $798.9 for tool, I found that it experienced frequent disconnections. I've tried resolving this with your customer service team multiple times, including speaking with Walton D., but have not received a satisfactory resolution.