Delhi Development Authority [DDA] — DDA parking charging extra money

Address: New Delhi, Delhi, 110091

Parking in front of Dwarka sector 10 metro station, comes under DDA. The contractor of this parking "Sanjay Yadav" charging extra money and also the slip of parking is not same as the rate list of DDA parking rate list. And also using harsh language while asking about this.
DDA is a very reputated authority, don't know why these people are doing cheating on the name of goverment organisation. I didn't find any correct portal for complaint of parking spaces. I hope some thing will happen here.
Please do the needful.