Your model number does not come up please check it.
I can find some info on a 363-9611781 which may be close to yours if the number you listed is indeed correct.
Your original problem does sound like a defrost problem which should have been temporarily fixed when you did a manual defrost.
How long have you waited for the unit to get back down to temperature?
It needs a minimum of 12 hours.
Also if the unit did a defrost cycle this could slow the process down as it would shut the compressor off for half an hour or so.
Is the compressor still running?
If yes then it is still trying to get to set point.
Recommended temperatures are 0 to 5 degrees in the freezer and about 40 degrees in the fresh food.
Is the evaporator (freezer) fan running?
Is the condenser (compressor) fan running?
If it does not get down to the correct temperatures and the compressor is running, remove the evaporator cover in the freezer so you can check the coils. If there is just frost in one area (usually where the freon enters the coils) then you are probably low on freon. This would be an expensive repair.
Since this post is fairly long I will do another post to address the original problem.