Do Alpha testing on my new commerce site

I need ecommerce site testing using all different types of testing to make sure every part of the site works 100% such as Content changes beyond simple descriptive text: headlines, images in sliders, and promotional banners. Formatting changes within your CSS style sheet. Adding any content to your secure checkout screens. Changing settings that may impact your checkout, such as payments, data collected, cart or checkout promotions, and links. Adding or removing links. Test regularly for cross links that may break if an item is removed or a promotion expires. Promotions Make sure you aren’t promoting expired or out-of-stock items. Site navigation changes. Template modifications. Forms added or modified. Changes to shipping settings. Promotional coupons added. Volume discounts. Login process changes. Landing pages added or removed. New ad campaigns that point to specific landing pages. System or application software upgrade or change. Major browser or operating system changes that affect your clients, such as Windows updates, Internet Explorer 10 implementation, major releases of Chrome, Safari, and Firefox. Only experts in e-commerce testing bid. You will need to supply past testing examples of commerce testing you have done. Also if there are other testing I did not provide please add to job