404 pages/Bandwidth Issue

Our clients hosting account has maxed out 10 gigs of bandwidth in a few days because (per google anayltics and awstats) people are going to the page where my GC testimonials are and getting 404 error pages to populate in a very high amount. However there are no LINKS to click on for the testimonials page on our clients website other than for the numbers below the testimonials. Not sure why this is happening. Please advise. Thanks!

http://skintelligentsd.com/testimonials/

http://wordpress.org/plugins/gc-testimonials/