Instruct: Classify a given review into positive or negative sentiment.
Query: Poor Customer Service

After using this product for 6 months one of the light bulbs stopped working. I ordered a new light bulb but this did not solve the problem. I called and e-mailed customer service at Flowtron several times but I never got a response. Flowtron advertises a two year warranty, but they will not follow through on their warranty. Flowtron has poor product support and customer service.