BookMyShow — Regarding Voucher not able to avail

HI Team,

I was having a voucher which I have not availed due to some circumstances and over the voucher its clearly mentioned as it will be avail from purchase date to 12 month. BUt today when I have tried to avail that it shows Sorry! The balance in the Gift Voucher has been exhausted (#-4113)

Can you please help here & do the needful. as it was having 2000INR voucher but I have not even availed.