Instruct: Classify Amazon reviews into positive or negative sentiment
Query: worst TV I have ever bought, customer service nightmare

The TV worked fine for 6 months then started having the same problem as everyone else, blurring around the edges, so the warranty center came out fixed it and left, worked fine again until just after warranty expired, same problem that was 14 months after purchase, it took another 7 more months, by which time the TV was dead, to finally issue a refund, this included calls to customer service, ECR (executive customer service), multiple calls to the service center, a regional engineer review, a case manager review, and finally a product exchange review, with every process taking "3-5 business days" so I called back over and over and over. WILL NEVER BUY SAMSUNG AGAIN< NEVER!!!!!