My friend, do not EVER give your bank account number over the net. You have just opened yourself up to all sorts of financial problems. This is a public forum and ANYONE that is here now knows your personal banking information. Go to your bank and tell them what you have done. You need their assistance to correct this error! You need to do this ASAP!!
Phone the bank and if you can pass the security details they will either send you out an account or tell you over the phone.