Today I delivered to her a shipment from amazon - toothpastes.
She was distant and it seems she wants only having business relationship.

I asked her whether I did something wrong and why she was acting like that. She answered "So-so" meaning that part of the fault is mine. But she denied to share what is the reason for her behavior.
Later I called her up.
Me - "I think we should improve our communication. It is not fair saying that I did something wrong and not telling me what exactly I did"
She - "Do not manipulate me. I think I treat you well. When I'm willing to speak I will."

I'll try not to disturb her anymore.