Oh sorry for that ...but come to think of that u should have prepared urself b4 the interview since u asked for the veune of the interview u should as well ask the manager or who ever invited u the time...as u can see the interview has already been taken.if the company is a private sector, may be u should meet the manager but if not sorry i dont think its their fault that u came late....all the same try and be serious and always make pre-preparation cos it will help u in case of next time ok.
Cheers.