DO NOT USE SNCF

Yesterday I wanted to visit Versailles with my friend we needed to buy metro ticket to go there but there was anyyy workers to ask which ticket we should buy so we bought 4 tickets to Paris (because we thought it's correct one and there was not any one for verifying) for going and coming back and it worked so we thought it was the correct ticket But when we got in Versailles the controller check our ticket and he said it's the wrong ticket and you should pay 70 Euros as the fine , I was like WHATTTTT?!?! he forced us to pay 70 Euros for a ticket that cost only 4 or 3 euros and that was an honest mistake,
Don't use this train and use other options even if it seems more expensive.