I bought an apartment in Yelehanka, Bangalore,Karnataka in May 2010 . My flat cost aroun40 lakh. at that time the builder gave me cost details and they wriitten that Service Tax,Reg. charges are not included in the offer,it'll be collected at the time of registration. After that 0n 17 th June 2011 , my registation of the flat was done. At that point of time they asked for VAT®istraion charges and i paid a 5% VAT; that was around 2 lakhs. They didn't collect ST, and told me that it is not required. From july 2011 onwards i'm residing on my new apartment. Last week they had asked me to pay Service tax (4.12%) that will become 1.70 lakhs. What will I do? Do i've to pay Service Tax now? They promised me that they are not taking S.T till now.Please help me out with this issue.