BB Curve 8520/8530 :: Can't Send Emails Or Download Attachments

I just had my phone for over a month and I am having problems sending email. I have contacted sprint via telephone, but they have only caused additional aggravation. Someone from sprint performed a hard reset and could not tell me how to restore my contacts. My fiancé helped me restored my contacts. I can get email, select reply but there is no send option available to send email. It worked a few days ago, but it is not working now. I can send email from my contacts, but not reply to an email I already received. Even when I try to download a document it says, “More request cannot be completed. Service book information not found”. I even tried the service book option I learned on crackberry along with turning it off and on, removing the battery, and deleting my email accounts and adding them again.