Please help i got Spam link attached to my site

Hi

I got a spam link that is attached on the top of the page on the site

The link is http://www.bingo-sites.org.uk/jackpotjoy/4573081870

And I try to search on google with

site: 4573081870

I found a lot of sites getting affected.

Can you help me please to remove it?

I really can’t find where it’s this from.

My site is http://www.chiptuning.com.au/

By the way, some times I checked it disappear and appear.

Thank you very much

Bright