fix my woocommerce website!

Hi all! I am needing help to fix three things in my ecommerce, so that my website is working well. my site is [login to view URL] 1.- The woocommerce plugin installed the SQUARE form of payment, the problem is that this message appears in the check out (image2) the purchase is not finalized, it shows this message: "Credit card number is not valid for sandbox use . Please use one of the test numbers documented at [login to view URL] " 2.- To the woocommerce plugin in settings, payments, activate the stripe option and install the plugin. But in the stripe account the payments appear only when I am in test mode in the dashboard, when I disable test mode it's nothing appears, check the files "image 3" and "image 4" . 3.- I would like my shopping cart page and checkout to be different, in the file "image 1". "image 5" & "image 6" is the example of how I want those pages. The problems from point 1 and 2 tried to be fixed, calling SQUARE and STRIPE, but they both told me the same thing, the problem is wordpress. I have not been able to contact anyone from wordpress so I am looking for a programmer who can fix these problems. And that also have the ability to work with divi theme to do the work of point 3. Thank you very much