How long do you have to cancel a car lease I signed a lease and within 24 hours the price was advertised 50mo. less than I paid.?

How long do you have to cancel a car lease I signed a lease and within 24 hours the price was advertised 50mo. less than I paid.?
Not sure where you're from, but in the UK you usually have between 7-14 days 'cooling off' period, during which you can change your mind and receive either a full refund, or a refund less the administration charge.