Refridgerator with freezer on top

My regridgerator started leaking water from the back wall. Water puddles under the crisper drawers and on the shelves. Sometimes the water freezes and all the food containers stick. My freezer is supposed to be frost free but just started to look like an ice cavern. Most of the ice that is forming resembles snow cone ice in the shape of ice cycles and is developing around the ice maker. But I do not use the ice maker....there isnt even a water line hooked up. The ice maker lever is in the off position. The frosty ice is now growing on the freezer door and rails. The ice started developing about two weeks ago and now my refridgerator temperature is not as cool.