BookMyShow — I booked the tickets for for wrong date

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Shipra 407 Godrej prakriti 187/f/1 B.T road sodepur suckchar North 24 Paraganas Kolkata

Hello I booked spider man tickets (4) today and forgot to change the date. I was supposed to watch this movie on 23 Dec but I accidentally booked it for 21 Dec.. I have already been paid for the tickets. Can it be modified for 23.
Can you suggest an alternative..