I ordered my medicine on 29 may 2019 and my estimated delivery was of 31st May. There was an attractive offer of amazon pay that if you pay through amazon pay will receive 25% cash back, so I decided to pay through amazon pay. When I did payment I got email from amazon pay that your payment has been done and your transaction ID is this and that.
But when I went to the medlife app again to check my payment status, there was still pay now option.