Need to use email addresses and account names of deleted accounts

Before understanding Twitter, I "reserved" a second and third account names, because I didn't realize I could change my existing account name and the affiliated email addresses. Now, as you can imagine, it's a mess. I need to:

1.) I developed a second account for a client that we didn't use. Now, I need to use my email address that was affiliated with the second account, for the original one (@LocalMattersOrg). I've deleted the second but it still says "email in use" when I try to change the email under the first account.

2.) I started a second Twitter account for myself and I want to delete it, and use that screen name for my more popular account. Even if I delete the existing second account (@jenniferpbrown), it won't let me reuse the screen name with my first one (@trigrlohio).

3.) I need the email address affiliated with my second account to be switched to my business account (@jp2comm) and the email address affiliated with my business account to be transitioned to my current account (@trigrlohio).

*WHEW* I assume this is something only Twitter can support but figured it's worth the asking here, since I've no idea how to get in touch with Twitter.