MakeMyTrip India — Travel insurance which was covered by MMT only according to my flight

Address: Gurgaon MakeMyTrip India Pvt. Ltd., DLF Building No. 5 Tower B DLF Cyber City, DLF Phase 2 Sector 25, Gurugram, Haryana 122002, India

Hi,
The insurance which is added to my Flights are totally wrong i am travling from 15th Aug to 21st aug Delhi to Veitnam and this insurance is covering only 15ht August to 19th August and i tried on App and other places but did not get any revert or not even on the number provided for help in MMT portal. i am flying tomorrow and want correction in my Travel insurance.