Perform penetration tests for my website

Job ID: 35144159

Budget: $200 – $250 USD

I have a website and it is ready working and live and I use VPS to host it.
The problem that recently my server provider told me that my website is being attacked. The website is built with core PHP.
I want someone who can perform a penetration tests to my website and provide me with full report.
Please tell me the list of tests which you will do.