VW POLO ENGINE PROBLEM

Hello all.

 I was driving my car tonight on the motorway when the oil light came on and started flashing. The next thing there was a knocking noise and then and bang and something fell off (which we found out on the hardshoulder was the exhaust!!) Anyway the next thing the car just shut down and slowed down to the hardshoulder. It wouldent then start, any ideas would be greatly appricated.

 Thanks ben