Orchid Infrastructure Developers — orchid island sector 51 gurgaon - prior year maintenance charges revised and billed

Address: Gurgaon, Haryana, 122003

I bought a house at orchid island, sector 51, gurgaon in december 2017. The builder has conducted an audit for last 3 years and have retrospectively revised maintenance charges of previous years 2015-16.
I bought this property in december 2017 and still i am being asked to pay 2015-16 revised maintenance charges for which i cannot be held responsible since i was never owner of that house in 2015-16.
I am still being forced by builder to pay charges despite being aware i was never an owner in 2015-16.
Further, the audit report was issued in july 2017 and the invoice was sent in last week of january 2018. This property was sold to me in december 2017. How can they issue noc for sale to owner if maintenance was due.
I seek support to waive of the prior years maintenance charges since i was not owner in 2015-16 and cannot be held liable for it