Support for Ukraine - free lessons

Hello Zoom Team! I am a Polish language teacher. I am supporting Ukrainian refugees by organizing free Polish lessons. I just bought a Zoom paid license for one month, but it is costly. Is there a chance that I could organize my 90 minute classes next months free of charge? Also there are many people willing to participate, more than 100 hundred.

Who could I contact to ask for support/help?

Thank you in advance!