Hi!

I was depositing into localbitcoins, 10 minutes after my initial deposit, I heard another *peep* from my blockchain and saw that another transaction was made without me doing anything.
Few minutes after that, the second transaction got it's first confirmation. Bitcoin has been taken from my account for both transactions and as i've heard, I will not be able to cancel this.

Even more weird is this that blockchain made the transaction while I even didn't have enough coin, so it made my address negative (-0.4 btc)

This is relatively big amount and I need some advice how can I get my money back?

Thanks