Hyundai Motors India Limited - Car dealer did not give the car that we booked

I bought a **** model Hyundai Xcent car (white colour) at Namakkal showroom, Tamilnadu (Pin code-******) with Registration number "TN ** E ****". I wanted to complain about the bad experience we experienced at Namakkal showroom. I had a Santro car which we wanted to give in exchange on purchasing the new Xcent car. When we go to the showroom for the first time, the salesperson there mentioned that they have the same Xcent **** model car which they can give for less price (Around * lakhs) compared to the same Xcent **** model car. After * days, when we called the salesperson that we are ready to take **** model car, they said ok and they asked us to come to the showroom at around *'O clock in the evening on the same day. We made the cash ready and we were about to reach the showroom, they told us that the car has been sold out to someone else. We got shocked as in the morning only they confirmed to us that we can buy it in the evening, same day. We got highly disappointed. As there was only one **** Xcent was left, since it was sold out, we somehow convinced ourselves to buy **** Xcent.
And here comes the next disappointment. We showed them the Santro car which I had to give them for exchange. The sales person told that they will not take the old car if we are taking **** Xcent and they will take old Santro if we purchase **** Xcent. And for your notice, they never mentioned that there is an offer of Rs. ***** for just exchanging and on top of that, the price of the exchange car will be added. They asked the car for cheaper price and hence we decide to sell it outside not knowing that ***** exchange offer is there. And finally, we bought the car TN ** E****. When my dad's friend mentioned that there is an offer of ***** for exchanging after we purchased, we got highly disappointed that we were cheated once again. When my dad went and asked them about the offer, they were told that 'We mentioned Nah sir, that we will buy your old Santro only if you buy **** Xcent'. I swear that they never mentioned this ***** exchange offer to us.

I highly regret buying this Hyundai car because of the cheap behaviour of the salesperson in Namakkal showroom. I would like to mention the name of the salesperson who we were in touch with buying this car. His name is Eliyan. After I bought this car, my cousin wanted to buy the same car. But we told them not to buy because of the bad experience we had. And they bought TATA Tiago car * days back.

I want justice for the careless behaviour of the salesperson and I want you to take action on them regarding this issue. I also want Hyundai customer care to give us the appropriate amount that we lost on missing this offer because of the salesperson.

I also wanted to mention that my phone has auto call recording option enabled, and if you want, I'm ready to send them over mail for the proof. Hope that you will take action. Otherwise, I will have to look for some other option to take action on them. I will never recommend Hyundai cars to any of my friends/relations from now onwards.