Lodha Group — Please cancel the booking and refund the booking amount for lodha crown

As per the conversation while booking the flat in lodha crown the finance department studied the case and committed 95% loan will be done. after few days of the booking they say that only 20L amount will be financed remaining amount you have to pay.how a middle class family can bring 16L amount . I said them to cancel my booking and refund my booking amount there is no response from there side. It's around more than 1 year