Hi, if the application hasn't been assigned to a decision-maker then no one outside of the Call-centre is looking at how many times someone phoned.
Once the file is assigned then the officer is looking at the application(s). I suppose that they might notice if someone called hundreds of times and wonder if the applicant is just a little bit nuts?
It's a snippet of perhaps unrelated information, or it could inspire a decision-maker to believe that there's sufficient mental instability that the applicant would be better off subsisting in their country of origin, for their own well-being.
It's a funny world, isn't it?