Spilt Milk Over my Laptop Keyboard

I've accidentally spilt about half a bowl of milk (with cornflakes) onto my Macbook pro and it's only 6 months old... :( It powers up fine and is able to work like normal except that I have discovered a few problems so far:

1. It shuts down automatically at times, especially when I left the macbook on for a while

2. The letter "A" key is more difficult to punch down (but still work)

So I brought it to Apple store in hope that they can still save it from any internal damage. And the technician told me that when they opened up to check, some components in the top case are corroded by the liquid, and they need to replace the top case, logic board and the antenna (as they said the WiFi is not working properly even though it still works when I use it). The repair cost would total up to over a $1000, which makes it uneconomical to repair at all.

Is there any other way I could still save my laptop? Appreciate any help please!