Ghost hiring in Cars24

So recently my friend from Cars24 shared an opening for a product designer at Cars24, The interview got scheduled within no time all thanks to the referral, it took 4 rounds of interviews (including the assignment round)

I was careful to discuss the salary before they agreed. All went well, got accepted today I was going to receive my joining letter but HR ghosted me. When I asked my friend to ask HR internally she replied that now our priority has changed we won't be hiring anymore.