[Q] I rooted my device by now i want my warranty back

I have rooted my galaxy ace duos by q file name acegingerroot.zip

i just done it because my phone was damn slow...nd i wanted to remove stock app
now i unrooted my phone with unroot.zip file nd the superuser is gone but when i
check my phone by a root detector app like got root app or root checkr...it says device is rooted...
even i downloaded super user on my phone nd its running even though i unrooted it...



my method for unrootin was recovry mode...option...

i dont have computer...now wat to do m fully frustrated



help meee:confused: