LittleApp — payment was deducted but coupen not generated

Address:

Chennai, Tamil Nadu, 600081

My littele account phone number.[protected] and i tried to purchase the voucher from haunted, for rs.289- on 24.04.018 at flash sale. During transaction payment deduct from paytm via andhra bank account for rs. 289/. But coupon didn't got generated.
I raised a request on this with little app customer care many times, but didn't get response till now.
How get cash refund. Request you to please look into this issue