SOTC — wants us to pay additional funds for changing the tour dates

The company is scheduled to operate a customised ladakh tour from chandigar on 8.6.2020. As by way of advance they had already taken as deposit of ₹30000 initially on 31.12.2019 as minnimum depsit amount. Now they have cancelled the tour due to inconvenience of transit as there was unprecedented lock down all over the country. Now they have come with the proposal that they shall hold back the amount and offered us either we reshedule the tour to the same place by 31.3.2021 or to some other place within india by 31.3.2021. For this rescheduling by whichever option we are further required to pay an amount of ₹ 2500 per torist [we are 3 in number] which amounts to ₹7500 in addition to the amount of ₹30, 000. Disputing this ihave already mailed them; they have not replied to that. I shall look forward towards your intervention in this regard.