India, April 21 -- Residents of Imperia Esfera in Sector 37C of Gurugram, are embroiled in a dispute with their builder, Imperia Structures Ltd, who they allege has threatened to cut off power supply if residents do not comply with a hike in maintenance charges. Pragati Associates Pvt Ltd, the builder's maintenance agency, has allegedly raised the fee from Rs.3.15 to Rs.4.52 per square foot without prior consultation, triggering a wave of protests from the Resident Welfare Association (RWA) of the condominium, residents said....