We need more information to be helpful. But in any case, just adding budget to the campaigns without other changes will not do much. You’re just gonna get more of the same traffic. Not all clicks are equal so find which clicks are more important for you and only spend on those.
* Check all places where you can apply bid adjustments (device, demographics, audience, locations, etc.) and decrease bids for traffic that do not bring in result.
* Add observation audiences if you haven’t already.
* Always check your search terms report for irrelevant traffic.