Jimena,
I notice you have a Yahoo email address. The spam is not coming as part of Radiant Recovery. You need to contact Yahoo about it.

One other thing to try:
Go to http://groups.yahoo.com
Then click My account (up at the top)
It will probably ask your password
On the next screen, partway down, there is a link that says "Edit your marketing preferences"
On the next page, make sure none of the boxes are clicked, and then click Save Changes at the very bottom.

This might help but if you are getting a lot of spam at your Yahoo address, you still may need to contact Yahoo.

Kitty