MakeMyTrip India — Unable to change the flight date through makemytrip as committed by MMT at the time of booking

We have booked our travel tickets from Doha to Montreal via Frankfurt with MMT India, our booking ID is NN[protected]. The date of travel is 06 August 2021. However, Doha yesterday changed its hotel quarantine rules for Indian travellers and the rules are effective from August 02, Due to this sudden change, we now want to change our travel dates to August 15, 2021 instead of the earlier 06 August, 2021. We want to comply with Government regulations but MMT is not allowing us to change dates. There is some issue with their application. We have been complaining for the last 12 hours but with no resolution from their end. We request for quick and early resolution to this.