Please help me adjust CSS of testimonial plugin

Hi ,

I use testimonial plugin for my site : http://codecanyon.net/item/sweet-wordpress-testimonials/3590272

You can see that plugin how work and display . But when that plugin work abnormally on my site :
http://charmspa.vn/danh-gia-cua-khach-hang

I contacted with plugin supplier, he said only need adjust css , but i tried and couldn't fix that .

Anyone please help me fix css of testinomial plugin back normal.

Thanks .