Wow, that is a lot of ice in there.
Sounds like what you have done was poked a hole in the sealed system and the freon leaked out.
Time to look for a different refrigerator. About the only time it's worth doing a sealed system repair job is when the appliance is under warranty.
By the looks of the photo you posted I would say this is a smaller size refrigerator and something that is old enough that it's no longer in warranty, correct?
It would have been best to turn the refrigerator off and let the freezer defrost on it's own.