Anyone who shuns another, is not a REAL friend anyway!
So if you're shunned by someone in a congregation, be glad that you have seen that the relationship was never genuine or UNCONDITIONAL. It was a CONDITIONAL relationship based on a manipulative premise.
Why allow such ones any power over you emotionally? They don't deserve to have a relationship with you if it is so fickle that they drop you because cult leaders directed them to do so!