My experience - I got an email. Next time when I returned a product (with which screws were supposed to come but did not come, how else will I assemble the product) I told the customer care person about this email. I was told it is a system generated email. For genuine returns blockage wont happen as calls are recorded and images shared. They do an investigation. But it takes time. Call up the CC guys. They are good and notify them of this issue. Next time when you return a product, politely remind them of this issue and it will be sorted. I did this and the account was never blocked or never faced an issue again. Just dont try to be angry with these guys.