Doesn't have advertised range

I have a 30 year old antenna on my roof that only gets 4 channels. I was hoping to replace it with this antenna. Installed it and ran a channel scan twice. ZERO channels found. Our house is only about 20 miles from the nearest broadcast tower and 25 to to 30 from the other three towers in our area. This is advertised to have a 50 to 80 mile range. In there instruction pamphlet (only one page in English) they say to contact them if not 100% satisfied but give NO phone number or web site to contact them. I will be returning it.

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