If I did not receive a 1098-E form from my student loan provider and my loan was transferred to another service, how can I find what I paid in interest for the year?

Hi! I was with cornerstone loan until November 2020 of last year, when I was transferred to fedloan. I asked them how to get my 1098-E and they say to consult with a "tax specialist". Does anyone know how I can get this information? Thanks!