So I'm a freelancer and started working with a new company 3 weeks ago.

I'm not officialy in a contract with them but they added me in a group chat of 14 people

For christmas they decided to make a gift for the boss. So everybody but me sent $100. I only sent 50$ because I feel like it's more than enough. I just started working for them. But now the project manager started shaming me for being greedy. I can't believe how impudent that is!

Is there anything I can say?