***** unauthorized debt order

I know nothing about this company and yet a debit order from them went through my account for this month on the 25 June 2023. You can't even reverse it because it is locked by them not even my bank was able to assist me in reversing this debit order because it's locked by service provide. I was told to contact them. How do I content a company I know nothing about. Can you please reverse this ASAP I don't work so that people can take my money anyhow.