BB Curve :: 8900 - Enterprise Account Activation After Wipe Out

I had an old BB curve 8900, am I had some problems with it and I decided to buy another one. On my old BB 8900I had Enterprise activation account. I received a new password and ALL the things I had on my old phone were synchronized on my new one. And I don't want that. So I've wipe out my phone. But surprise when I entered my Enterprise activation account all the previous things that I wiped out were on my new wiped out BB curve 8900. I don't want that. I want a new fresh BB! How can I wipe out everything, activate this account and have a fresh start. I love this function, I love that all my contacts, mails etc., were there, but I just want to copy a part of them. (I'm doing this because a while ago I've changed the language of the phone and in the upper right corner is a mark with "EN" and I really hate it, and I want it gone, but every time I change the phone, wipe it out, it reappears)...