Instruct: Classify Amazon reviews into positive or negative sentiment
Query: junk product and service

Buyer Beware. I purchased this system, laid it out in my garden and turned it on. then I tried the collar on my own arm. It did shock me, but immediate the system went down and would not come back on.I called customer service and after lots of questions 20 minutes later I was told I needed a new transformer. They then had me email me receipt for purchase which I did. But BECAUSE I PURCHASED IT ON AMAZON "WE CAN NOT VERIFY YOUR VENDOR" AND THEY REFUSED TO REPLACE IT. THEN AMAZINGLY I WHEN I SAID OK I'LL JUST PAY FOR A REPLACEMENT, THEY SAID NO THAT WAS AGAINST THEIR POLICY!!! SO I AM STUCK C NO WAY TO FIX THE PROBLEM!!