Maybe you're just explaining the problem incorrectly to them. If it's a 72MHz radio then "hits" are not the fault of the radio. You're operating in an unsafe environment with other senders on your channel or some large broadcast source nearby. The radio is fine.

If it is a 2.4gHz set-up then something else is causing what you believe to be "hits" but must be something else. Could be battery or you're standing too close to the receiver. Do a ground test from 50 feet and see if it "glitches". True hits are rare and usually the result of other events.

But, if the radio is less than 30 days new and you are dissatisfied (and haven't modified it in any way) they should still take it back. I have had excellent results with Tower but have always purchased my electronic equipment at a local hobby shop. There you can look them in the eyes and discuss problems.