Bayyah is only given to a righteous Muslm ruler or leader of the Ummah, for the cause of Allah, and not to an Organization. This seems a bit strange to do this, maybe it’s best to not get too involved with the organization aside from helping with the charity projects. Of course you leave whenever you like, this is up to you.

I recently joined a islamic organisation who are involved in various social projects for the downtroden muslims in India. However, when joining, a person held my hand to recite after him. It goes like “I pledge myself to the organisation and this bayyah is between me and Allah and I will give every second of my life dedicated to this organisation etc” is this valid?can I leave the org if i wish?

Oaths | June 30, 2015 4:19 am
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I made a vow to fast two months when my father is fully recovered from his massive heart attack. However, since then I read in a Sahih Hadith that Rasulullah SAW discouraged this type of vow because it does not change Qadr I want to know if it is permissible to change my vow to me fasting two months regardless of whatever happens?
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I heard someone say that if you break a promise to Allah, one option is you have to feed 10 ppl two meals, but he said that you have to do it yourself, it doesn’t count if you pay someone else to do it. Is this true? I have seen big charity company’s offering to do it if you pay.