I have heard that therapy for survivors of cult abuse is extremely challenging and lasts years. You have done amazingly well all by yourself, without therapy.

I think you need to assert your boundaries in a step-by-step way. first and foremost, no money lending $$$. Have they returned the borrowed money to you?

After you have had a good record of resisting guilt-trip-laden requests for money, you can become more assertive about communications.

If there are people who owe you money and are behind in returning it, and, if those people send you indoctrinating emails, you can respond with:

"While this all might be fascinating, I would prefer that you not spend your time writing emails but instead focus on earning money to pay me back."