Sorry to hear that the granting of your visa has been delayed to you both.

But you have lots of useful advice and help.

I would serously get to work on getting them letters testfiying all was in place from the church and caterers etc to the embassy asap.

I would also ask J lewin what number she called on and when? did they have the current number and was there a reason why the call may have not got though.
I.e tuesday afternoon the caterers phone line was being repaired.

As joe mentioned pete wrote from others experince the days after a denial are vital as it can be reconsider in some cases.

have you tried your MP (again a long shot but worth tryign anything?)

Its worth a try.