TI-API: Customer Direct Pricing (Backlog API)

Tool/software:

Hello, hope you are having a great day.

I am developing a system with backlog API suite
but i faced an issue which is not being able to list past negotiated prices of the Products, (i have used test endpoints)

My problems are;

• Since my users can't keep track of the all CDPs', I want to provide a list of products with CDPs' but i couldn't find way to do it
• Even if they know the prices, as the related post suggested, i have included  'endCustomerCompanyName' field to my requests but still i can't order with my negotiated prices.

  {
                "code": "TI-TXT-005",
                "type": "INFO",
                "reason": "Pricing could not be determined",
                "message": "Sales order created, but price is not set up. For further support, contact TI customer support https://support.ti.com/csm"
              },

How can i solve my problems ?
Thank you