If you keep getting ice on the floor inside the freezer then this is down to a blocked drain hole inside the freezer.
If you can then you need to empty the freezer and remove the drawers.
Then you need to remove the plastic rear panel inside the freezer.
If theres another plastic panel behind this one then remove this as well.
Then you will see the silver evaporator.
Under there is the drain gutter. Now this will be all iced up so use a hairdryer or hand held steammer if you have one and melt the ice.
Now you dont want to chip it out as theres a heater under there and you will damage the heater if you do this.
Once the ice is melted you will see the drain hole.
Pore boiling water in there and get something like a cable tie and push it into the hole and that will clear it from there.
Once clear refit the panels and that will be back to normal from there.
Now if you dont fancy doing that then you can try a 24 hour defrost and leave the freezer door open and that can sure this fault.
So try that if you can as the fault you have is just a blocked drain hole in the freezer thats causing this.