I joined a congregation that normalizes harams, what should I do?

I joined a congregation in Europe and served as the head of guidance in the management team of the society in the city where I live. The leading staff of this congregation had a fatwa written. In this book, it is written that the bank loan has nothing to do with the interest described by Allah and His Messenger. It is also written that women can go to Hajj and Umrah without a mahram. It makes me very uncomfortable. On the occasion of this organization, I invite people to Islam in various ways. We also perform good deeds, but the leading staff bothers me a lot. What do I have to do in this situation?