Restore hacked wordpress site

Please see website below which has been hacked.
http://www.nationwide-commercials.co.uk/

I would like to ensure that the website is restored to what it was originally and the wordpress version is also upgraded to make it secure.

The site if hosted on below hosting provider and I will provide access to this account.
https://cp.hosting.123-reg.co.uk/

Please let me know if you need any other information and bid only if you are confident to deliver this work quickly in the next couple of days.