Return request, or response to keep

I have an old foot detox machine that is not working properly. I have been reaching out for months now with no response. I just ordered a new one that was delivered, but am concerned about customer service’s lack of response. I do not feel comfortable keeping the machine I just received if the company is not answering phones nor responding to emails. I have already submitted a ticket, but there is no trace of it being submitted. Please call me back at 831-325-8446 or email me at Thrive@PoceanWellness.com. I see on your website that I only have 10 days to return, I’m just hoping that if I send the machine back I’ll actually get a refund, since I question whether anyone works there anymore…