Got my ducts cleaned last year with this company, not sure if the job was properly done as the techs did my entire house in about 20 minutes .
Now, one year later , Mark, probably a "customer service" staff called me about a minth ago offering the service again. At the moment I was at work (a noisy factory environment, couldn't hear properly) and I asked him to call me on the next week. Well, after 3 weeks he called me when I said I don't want the service and since then he keeps calling and harassing me over the phone just because I don't want to have their service.