I Used To Have Double Eyelids, But Then I Wanted

I used to have double eyelids, but then I wanted a third eyelid crease so I used some eyelid tape. It worked for a few days, maybe a week. But, one day I woke up with Monolids! Now I want my double eyelids back so I use tape, but every so often my eyelids become monolids again. How can I get my original double eyelids to stay permanently?