If the bank account is in the name of the church then nothing you can do directly with e bank as you have no direct access rights. Only choice is for you to contact the church asking them to release the funds to you as promised. Do not wait for the church to contact you. I hope you have this match promise in writing?
My answer is not intended to be giving legal advice and this topic can be a complex area where the advice of a licensed attorney in your State should be obtained.