Detailed Instructions: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Q: This charger is horrible. Worked for long enough for me not to be able to get my money back from Amazon. Makes the screen blink while charging and flashes back and forth from charging to not charging. Customer service at this company is horrible. After waiting two weeks for a response they wanted me to send it back before I get a new one. Who knows how long that will take. I am probably going to have to trash this waste of money for the more expensive Apple one. I guess you get what you pay for.
A:
Negative