Early payment Issue

Hi. I had a question. I bought an iPad with pencil on installment on 2023. And I got 2 different contracts for them. I requested for early payment of ipad on December. I got a letter of confirmation of payment for my iPad only. Now I can't login for ipencil contract. It says my username does not exist anymore (for ipencil and iPad both). Was the early payment for pencil done as well?