Go Air — Not letting to complete web check-in without selecting seats

While booking the ticket there was no mentioning about paid selection of seats, but while i tried to do manadte web checkin they are asking for money and not giving an option to skip seat like other websites, this incident happened on june 2022 .. if paying was mandate they should mention it while booking why would i have to pay if i dont want to sit in particular seat if they have mentioned free in app why cant i see the free seats when i try to book ticket.. Air line is scam