I made the mistake of adding Opera mini to my fairly basic Nokia phone, before I did this I could access the internet, now I can not so I want rid of it.... help please .

I made the mistake of downloading Opera mini onto my phone MONTHS ago.. and since then I can not access the internet.. I COULD access before I had the blessed thing.. I would like very much to remove it from my phone... how do I go about that please , given that I can not access anything ?