Cant log in

Paid, Sridhar Katakan for a wordpress affiliate review site
http://www.bestnaturalcurereviews.com I was given a password to get to the admin
area but never seemed to need it until one day i checked the source code
scrolled down and found the sneaky pricks own affiliate link.Now the password to get into the admin area wont work from the one given.How can I get a new password so I can get rid of the thiefs links.Regards Gavin Wills