I have been trying to fill out the application for almost a month now and so many things I need apart from references and tests. I don't remember when I entered the UK (does it have to be the exact day... I am not sure if it was the 4th or 5th of March ten years ago), I don't remember how many trips I have taken outside of the UK, etc. To request the information, I need a signed letter from a legal representative, solicitor, barrister, chartered legal executive, etc.
Are there any companies that can collect all the documents on my behalf and submit the application? I feel there are so many additional things to do and documents to collect, which you can see only when you click next and move to the next page

I have ILR.