Maharashtra Gramin Bank — I haven't get my money back

My name is sangram phad and I made the transaction of rs 898.8 on 10th march..For reservation on redbus app ...After while I cancelled ticket on 11th march ...Then I got msg from redbus that your refund is send to the bank and it will be credited 3-7 days...Bt i haven't get it ...So u tell me how long does it take to do it ?????