Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Very poor, non existent, customer support

I recently purchased this item because laws in California mandate handsfree usage when in a car. The item looked great and overall got good reviews. When it arrived, it was very easy to pair up with my phone. When I used it though, I could hear people on other end, but they could not hear me. It was very frustrating to hear people then they finally hang up. I went through the pairing process several times with same result. I made sure that my phone was not muted. Same result. I then tried calling support and got a recorded message but was unable to leave a message. Tried emailing support 4 times and got their automated response message. Never did get a response from a human. I even found an email address of someone in marketing - sent them a request to have someone in support call me. No response. I have had to purchase another device (in the ear) to comply with CA law. I will keep trying to contact the company, but in this case, let the buyer beware.