Website completed

Hello, I had someone start a website for me they may be completed about 80 to 90% of the website. I have an open cart site that sells hair products and there are couple of changes that need to be made and the merchant account has not been uploaded on the website. The website is uploaded, but it's not operable to purchase things. I need to do a test after everything is complete to make sure is working. Website address (bayareahaircompany.com) so take a look and see what you think. I want to move fast and get this completed. Thanks.