Hi,
I am sorry to see that your website has been hacked. My bid is a placeholder bid and not actual one. Actual bid, unfortunately, may be more than the project budget and will depend upon the language your website is designed and the OS and web server on which it is hosted.
Can you send me the URL of your website so that I can do some testing on it. Even if my proposal exceeds your budget, the report of my testing will be shared with you free of cost and you can have others fix the site based on my report.
Do please check my review on the site. A new freelancer though an expert in Microsoft technology, I had already finished a project titled "Server Hardening" which is also for a UK based client. The site that I secured is featured in my portfolio.
I look forward to hearing from you.
Regards,
Abhi