delivery issue with truemeds

my cousin ordered medicines from truemeds. on date of delivery ecom person called him and said to give him otp as he needs to check the products as per company policy. he denied to do so, then delivery person called him to different location to collect the order, he again denied. now from past one week the product goes out for delivery and then at the end of the day it says address is wrong, customer not available at home, customer not found at address, number switch off etc. Raised complaint on phone and mail to truemeds and ecom. ecom is pathetic and never replies. truemeds phone support has no power. their email team keeps on replying that they are arranging the delivery. they never cared to even acknowledge the fact that the delivery person asked for otp on phone. he even mailed their grievance team but they are also pathetic. its been a week now. he called their customer support and asked for money back, they said that they have raised it to concerned department. On mail they are ignoring the money back request and are just saying that your address is wrong so delivery person is not able to deliver or that you are not answering the delivery person's call which is a lie. what to do here?

@Ash-D @Snapz @Watcher @Rajkotian @flash007 @androgame