Puravankara Projects — Very poor service/response

I have purchased an apartment in Purva Windermere and am disgusted with their service. Quality of construction is very bad i.e. water seepage and leakage is a major concern in most of the apartments and the site management doesn't respond to any complaint. Even though I have made full payment and taken possession of the apartment, I am yet to get documents namely, Property tax receipts, NOC for EB name transfer etc. Moreover, they charges exorbitant delayed payment charges for no fault of mine (Quality of workmanship was unacceptable and many rounds of inspection took place and I had to pay for their delays).