I had a debt with Ulster Bank and they have sold it to these vultures Cabott Finance and Belgard Solicitors but not before sending out a heavy to my parents house looking for me and in his wisdom he decided it was fair game to tell my elderly father what he wanted me for and that I had better pay up. He tracked me down to my new address and when I opened the door he barged straight in and sat in the sitting room. He was a right nasty piece of crap and I asked him to leave more than once before I threatened him that he was now inside my home and I felt intimidated and if he didn't f off I would not be responsible for my actions, he left and I rang the bank the following day and all i got was that's what you get for not paying your bills.
Do you have a name for this "Thug" as this is what he is if your description is accurate.
Is he licenced ?
If your description of how he entered and stayed in your house is accurate he would probably be guilty of a criminal offence.
He would have questions to answer under Data Protection if he discussed your debt with your father as you state.
Cabott might also have questions to answer if this is the type of individual (as you describe) yhat they employ.