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From my understanding they are not allowed to contact you once there is a stay in place.
Here is an article about it it's old though:
https://robertweed.com/2011/07/09/i-filed-bankruptcy-and-they-are-still-calling-when-do-we-sue/
I think it comes down to if you told them and they keep trying you have some recourse.
Have your lawyer contact them for a fresh reminder to leave you alone.