Paytm Mobile Solutions — Cashback issue in paytm wallet

I placed my order on nykaa and paid through paytm with an offer of cashback within 3 working days. My order no is order #[protected] and i placed it on[protected] but havent received any cashback yet. Please solve the problem as soon as possible and transfer the cashback in paytm wallet as offered ag the time of payment so that we can make more transactions through paytm in future.