JustDial.com — took excess money and denying to give a bill

Address:

Banglore

I had to reinstall my dish tv on 14th of july 2020 becsuse we reloacated i contaced jd they sent a technician he installed and told the receiver is not strong so he has to replace it as i was in my office i agreed he charged me inr 600 and told wire is not enought so he had to exted so i told ok qll togrther he charged me around inr 1300 with which i could get a new connection! When i asked for bill he told we wont get a bill i asked why he told we are from jd we dont give bill and warrenty... He even took the replaced items with him he told he will give me the bill through whatsapp still now he is not answering my calls this is the number of techinician and he women who sent him

Techincian:[protected]
Caller from jd (Pavitra) :[protected]

Is this the way?

When i texted him about the bill he blocked me.

I have attached a screenshot.