Service tax & vat

Hi Sirs, I recently purchased a flat with one of local builder and got it registered on my name. during the discussions of the booking of the flat he confirmed that occupation certificate was already allocated to the building, however he didn't yet provided the document to me. At present builder requesting me to pay service tax of 15% on 25% of total cost of the flat and VAT of 1.25% on total cost of the flat, as per below articles ST and VAT shouldn't be paid to builders. http://economictimes.indiatimes.com/wealth/real-estate/service-tax-on-purchase-of-specific-under-construction-flats-pay-or-not-to-pay/articleshow/52796609.cms http://indianexpress.com/article/business/business-others/dont-pay-service-tax-to-builders-delhi-high-court-to-homebuyers-2842126/ http://www.hindustantimes.com/real-estate/now-get-ready-to-claim-refund-of-service-tax-paid-to-developers/story-z5Sbc3oCttn2S5jhXlAFNI.html I would request you kindly look into this matter and help me to save my hard earned money. Thanks & Regards,