Hacking issues

HI,

I have an issue that I hope you can help with.
Basically I had someone make my website which he did and it looked great.
I have recently been hacked and I now have someone fixing this however he needs the license code which I was never given and I now can’t get hold of the man who built my site so i’m in a bit of a predicament.
Is there anyway you can help me with this?

Many Thanks,

Ben