We stayed at Brialee a couple of years ago when we were heading to Maine. It was an OK campground and the girls enjoyed the fishing and swimming lakes. It was just an overnight.
From their website:
POLICIES
Cancellations: Cancellations require minimum of 2 weeks notice for campsites and 30 days notice for rentals – no exceptions. Refunds with appropriate notice will receive refund of paid amount less 10% service fee. Cancellations less than the appropriate notice will not receive any refunds. No swaps. No exceptions. Site Guarantees: We guarantee your requested site 99% of the time.
Seems to me that this is pretty straightforward and there really shouldn't be anything you have to complain about. It says plainly that you will not receive any refunds.
I don't see why you are complaining because this is very clearly stated and there is nothing that says you should be able to switch or get a credit or anything else.