Marg Compusoft — Software and setting up

We at Pranesh Trading House are majorly misguided by one of your partners namely Ganesh Dongre (techcraft)
This person gave us the demo delivering promises of setting the software according to our convenience but as soon as the payment was made he started avoiding our calls and a big delay is faced by us until today.
There is no invoice sent by him in the first place after purchasing the software up till today (it has been more than a month), the customization was done after 2 weeks which still has a lot of changes to do, the person constantly asks for customization fees and the worst thing about him is he hangs up on the call.
He has filed the GST for our purchase and has not sent an invoice to us which by the way is an offense.
I request you for a change in the partner handling our software issues and take strict action against such partners as the name of your software is being heavily compromised.
Two other distributors have also asked me for similar software, and I will definitely not recommend marg after my experience. The software might be good but this employee makes a terrible impression.
I have also filed an official complaint against misleading behaviour of this employee in Grahak Vibhag portal.