Won a prize but can't claim

I won a complimentary stay for 2 which is valid for six months and this prize was won in August. Since this date I have been trying to claim the reward for a Saturday stay at the above property and it is unbelievable as they advise they are unable to assist with this as it is currently peak period until February next year. This is ridiculous as how can you award a prize and we can't use it because it is peak period for six months. Absolutely terrible. Won't stay with them even if when I book on bookings.com.