No problem at all. We know that pets - cats in particular - are very fussy about where they sleep or shelter. So if your pet just doesn't like it, won't go in, then you can return to us within 30 days for a full refund - no questions asked.
We do recommend that you try putting a comforting item inside such as a blanket or cushion they are familar with or even one of your own old jumpers. Pets are very sensitive to smells so something that comes from their home may help them enjoy their new shelter.