Xiaomi India — mi store purchase not delivered

Address:

Kottayam, Kerala, 686141

On 23.8.2018, I purchased an adaptor from Mi store online as the old one was damaged in the big flood, that hit Kerala during 16.8.18 to 21.8.18. After flood days, I ordered new charger from online Mi store and they despatched it through 'DELHIVERY' courier. They charged Rs. 50 as delivery charges. Yesterday, 30.8.18, shipment reached in my district and the courier agency returned it to the seller, mi, without intimating me. When I try to get contact number of my nearby 'DELHIVERY' agency through Google, all numbers were fake. In Kerala a lot of courier services are working in national level. I don't know why mi shipped my item by 'DELHIVERY' which has no franchisee in my area.
When I contacted mi customer care chat center, they tell that Kerala is in flood and that is why the item returned. Actually I ordered the item two days after flood. DTDC, a courier company delivered a courier on 23.8.18. Then why this company couldn't deliver my shipment. They didn't try to contact me before returning the item...
So everyone should be careful while ordering items from Mi store online... Go to Amazon or flipkart..