Optimize My Google Ads Call Campaign

I'm facing a challenge with my Google Ads call ad. Despite having all keywords correctly set up with exact match, I'm receiving a significant number of irrelevant calls.

Actions Taken:
- I've already added negative keywords
- Adjusted the ad copy
- Changed targeting settings

My campaign targets a national audience. I need a Google Ads expert who can help me refine this campaign, reduce the number of irrelevant calls, and ultimately increase the effectiveness of my ad spend.