Competitor App lying in app screenshots.

My app is a pretty popular app and theres only one competitor, after they notice their sales drop shortly after me releasing my app, they have put in their main screenshot '#1 paid apps' this is a complete lie and is untrue.

Its caused a drop in sales for my app.

How should I go about this? Is there anything I can do?

Ive reported this to apple a week and a half ago but have not received any response.

Thanks, MYW

Competitor App lying in app screenshots.
 
 
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