I first signed up with United Air Temp for cleaning the air conditioning duct and other services because they approached me and offered me their services. At that time, I didn't know much about which company to use, and I took their words for it and got their "discount". I thought I got a pretty good deal (based on what I was told by them), but when I compared with my neighbors, I found out that what they charged was actually much more expensive than other companies. With that new information, I didn't want to renew my service contract with them when the contract was over. They gave me a hard time about it and kept on calling back. Even after I told them I don't want to continue their service on the phone, they called again to ask if I wanted to renew my contract. They kept on calling to the point that I had to screen my calls. After a while, they stopped calling me. I thought I was free from their calls until just recently they started calling again about whether I want their service since they'll be in my neighborhood on so and so date. They are definitely annoying. Next time I am just going to answer the phone and tell them to stop calling here.