Click fraud is at an all time high, human, bots, etc.
Google does NOT help much, if at all. They don't care about you as a customer, even if you pay 5 figures + per month.
I tried with proof, video recordings, stats, patterns and so on - talking to the walls.
Google reps will literally tell you that "their team of specialists have investigated and no apparent fraudulent activity has been found"; if you ask for a report of any kind for accountability or just to be educated, they will tell you "we cannot provide such documentation as the investigation is internal only".
Google's customer service has been in India for the past 2 years. It is absolutely horrible in trying to get anything corrected.
I do recommend the IP blocking option, though.