Big mess up with account transfer... Is there any possible way I could fix this?

Alright, so I just tried purchasing L$10,000 today, and it said that the transaction couldn't be completed. So, a little annoyed, I decided to just purchase a little bit less, in case my balance wasn't high enough.
Then right as it said, "Processing" I looked up at the balance and found it at just a little over L$10,000. Immediately I frantically tried to press cancel on the transfer, but it was too late, and now I've ended up buying twice the amount of L$ and was left with an empty bank account=\

Is there anyway to either cancel the transfer, or return the L$ back to my account?

No, but you can sell them back to get credit on your account. You will not get back what you paid for it.

yeah, I tried that with the amount I wanted to return, and ended up getting only 1/6 the amount of what I paid for=\ Man, now I'm only left with 5 bucks to last me through the rest of the month. I'll see if I can sell any more of my stuff...

Make sure to sell L$ using the "advanced" (order posting) interface.