Flipkart — paid for three received only two.

I have ordered rawpockets large pvc stickers 3 nos on 11.10.2019. by cod. received on27.10.2019 and paid rs.179*3=537/-. after opening the box i found only one in the box and call the customer care. they told me balance will be arrived soon. i received another one parcel 03.11.2019. i opened it also found only one. so called the customer care immediately after receiving the pacel and informed them. one of the customer care executive who attened my call promised me to refund the amount and confirmed my account number with an otp. i haven't yet received anything. so i called the customer care once again. they told me it's their company policy. anything will be claimed only within 10 days. so we were unable to help you.

so please help me to get the money refund or the product.