This is not an enforceable agreement. This is why you should always get such big events or contracts in writing. You can always argue you relied to your detriment on statements but unless you have something indicating you agreed to x and y and they agreed to x and y (whether it is by email or facsimile), then you do not have an enforceable agreement. You can certainly show them all of the details you have agreed to including the bedrooms but if may be better if you simply asked for all of your monies back and move to booking a different venue. If this venue was listed on your wedding invitations, you may try to negotiate to have them pay for new invitations. Again, make sure you place everything in writing and both you and the representatve from the venue sign on the dotted line.