I received a letter at my house from DMS that was addressed to my birth name.
I have never used my birth name in my life, growing up I used my Mother's maiden name so I was a bit surprised about receiving it.
Anyway, I contacted DMS and they said the debt was sold to them by Arrow Global, who were instructed by Orange.
Apparently, it's a £380 defaulted Orange contract. I contacted DMS (wrote to them/emailed and phoned) and told them I know nothing about the debt. They came back with a statement, that had my birth name on and my address that I lived at with my family.