CANT GET MY MONEY BACK

I Gave the teller the correct account number and he entered the wrong acc...I went back and he accepted his mistake and they said they will sort it out and refund the money..now they cant give back the money because the owner of he account doesn't answer the phone...they locked the funds in that persons account but why do they need authorisation since they really know it was a mistake and theirs...its almost a month now no solution..