Instruct: Classify Amazon reviews into positive or negative sentiment
Query: escort has the worst cutomer service of any company i have ever dealt with

i received this unit as a christmas present and it worked great for 1 month at which time the audio signal went out i called the factory and they said to send it to them with the original receipt and they would repair,i did as they asked and several days later i received a letter from them saying they are going to charge me $59.95 to start repairs because it was purchased through an unauthorized vendor (amazon/electronica direct). i called escort and left 7 messages for the customer service manager to call me , when this failed i called the president of escort 4 times and never received a call back , after 11 messages the customer service mgr. returned my call and did not solve the problem. i then called amazon who solved my problem at once by refunding the entire purchase price .i was looking for another detector and called belltronics customer service line and the phone number was the same as escorts , on to another brand