Akward question from DWAP_ESA

Good day, Everybody, I am a newbie here and I am seeking some support, please. I have a bit strange situation and I do hope someone here could give me a clue how to react, what to do.
A few days ago I have received a bit akward telephone call and next a form to fill in from ESA. I have been receiving this benefit for over two years (together with PIP) and now they ask me if I remember, what data/info I gave them about myself and my incomes when claiming in 2019. I was quite surpsised to hear that question and simply did not know what to answer, as I honestly cant remeber either the questions nor my answers. When I told that to the lady, then she started asking questions about my adult son- if I informed them that he lives with me, whether he was working that time etc- of course, I did. And why should I? Then she asked me if I am still self employed- yes, offcially I am, but not working. So she sent me a form including two questions: 1.could you tell us the start and the end date of your self employment 2.could you tell us how and when you notified ESA about the self employment. PLus requirement: could you send us all your earnings/income from selfemployment from 2019 to date.
It seems like they lost part of my data, or just someone did not perfomr their job properly at that time- anyway, I feel strange with that, and dont know what toexpect. I told them all the truth about my situation, but if they screwed that up and now will chase me up for something- I might get in trouble. What do you think, folks? Thank you very much in advance for your help.