Ghaziabad Nagar Nigam — encroachment of public park

Mr. Sunil kumar tyagi (E-125, patel nagar 2) and mr. Rajveer sirohi (E-123, patel nagar 2) are continuously parking their cars inside the public parks. Also they have burnt many trees and cutted them so that they can clear the way for their car parking.
As these parks are not meant for parking cars or using the land as their own property so i request you to kindly get it checked immediately.
I would like to ask you to put a lock on the gate of the park and make it open only for walking purpose.
I hope this issue will be resolved as soon as possible otherwise i may have to talk help from higher authority as the case comes under ghaziabad nagar nigam so i thought to first seek help from you.