hii, I have read your requirements and after reading I can assure you that I can fix this issue easily..
I will run a detailed scan of all your website files to isolate any infected files. This scan will also discover any malicious files that should not be on your site. All infected files will be removed/cleaned from the site and shared with you.
Once we finish the cleaning we will also offer you a 2-month guarantee where we will clean your site for free in case if it gets hacked again, However that is very rare.
I have done such kind of work earlier too. You can check My previous clients review on my profile. Please send me a message so we can discuss further... Thanks