Shine City Infra Lucknow — non registration of plot no refund of installment

I have booked a plot in may 2015 in shine city kashiyana phase-ii sector-i on installment amount of ₹ 4000/- per month for plot number b360. I was regularly paying installment via online banking to company account shinecity properties pvt. Ltd. I have paid upto dec 2019. Company has adjusted the ledger upto oct 2019 but nov and dec installment not adjusted so i stopped to pay my installment from jan 2020. Now company's website is not opening and also customer care number not working. I want to refund my total amount.