How to Fix a Wet Compost
First try adding more brown matter and less green matter and additionally aerate your compost by stirring it often. You can also try improving water drainage in your compost by making the holes in the bottom larger and in worst case scenario, you can empty the contents of your compost onto the ground to let them dry.
Add More Brown Matter
Brown, carbon-rich matter such as cardboard or paper are very good at absorbing liquids and so adding dry brown matter can help absorb some of this moisture. Green matter also contains a decent amount of moisture so adding less green and more brown, will also help dry your compost.
Aerate your Compost
Another reason your compost is very moist could be because your compost is very dense and does not have enough air incorporated into it. Be sure to regularly mix your compost in order to help aerate it. You can also keep the top of your bin open so not only does air enter the compost, but the compost also dries quicker.
Improve Water Drainage
If you have noticed that the majority of the water in your compost is collecting at the bottom, it could be that your bin is not draining enough water from the bottom. Make sure your water drainage holes in the bottom are large enough for water to exit through and also make sure the holes are not getting blocked by anything.
Worst case scenario
If none of the above worked for you then you may want to look into emptying you entire compost bin onto to ground, spreading everything out, and letting the compost dry. Of course, this would be a very long and grueling process so please try all the above tips before you do this.