Hi,

I called up Orange yesterday as I had the same issue, my contract will
be finishing on the 5th march 08.

They informed me they would send a new sim card whereby i can change
this over to PAYG. They informed me i should receieve this within 7
days
at my billing address. I suggest you call them back Bob and say when
will i get this SIM.

Let me know how you get on

Al