Dealing with debts and debt disputes

I am so glad I found this thread and am hoping someone can give me some advice.
For the past two years I have had letters from debt collection companies, coming to my address, addressed to someone else. I thought I had sorted this out last year - I contacted the various debt collection companies and informed them that Mr X did not live here. They took a bit of convincing and some were worse than others, but eventually the letters stopped and I thought that was the end of it.

However, now it has all started again. In a matter of a week I have had three different letters from two different debt collection agencies looking for the same person. This time the letters are more threatening. One says that they have 'confirmed' that Mr X resides at this address which is complete nonsense and has threatened to make a 'door step collection'. I am really worried that I am going to come back from work and find that my house has been emptied. I just don't know how to stop this and it is causing me endless worry now. I feel sick with worry that someone might come to the door and force their way in. I have contacted the companies and told them that Mr X doesn't live here and I have sent the letters back to them marked 'addressee not at this address" but it doesn't seem to work. And when I phoned one of the companies they said they would update their records but that as soon as they got another debt to persue, they would said it to my address again so I feel like I am in a never ending cycle. How can I stop it? Please help! Many thanks.

Thank you so much for the information and the reassurances! I really appreciate it.

Can I just confirm that bailiffs can't enter the house when I am not here? I am sure I have heard horror stories of people coming home and finding their door forced open and a notice pinned on it stating that the bailiffs did it.

Thank you very much once again!

Thanks for that BUT I no longer have the problem - it will eventually go away.
I did not wade in with advice as I was waiting for the expert from the CAB.
What I learned was that the best technique was to answer the door via the bay window (which had a convenient piracantha thorn hedge outlining it) and advise some callers to go forth and multiply, when I did not recognise them and they asked for the previous owner (The property was purchased from "The Halifax" repossession department).

Many callers are unwilling to explain their business over a thorn hedge, but in 5 years the only attempt at forced entry was from a couple of simple youthful ("druggie"?) burglars, one of whom found himself "citizen arrested".

However what I did discover is that not all aggrieved callers have the same powers and the former owner did not leave details, of the presumably dodgy, business he tried to run from the property.

Inheriting the heritage, of what might have been a fraudster attempting a Reggie Perrin, can be a bit more complicated than dealing with the debts of a former flat sharer.

I wonder if someone could help

I got into a lot of financial difficulty in 2006 and entered a DMP with payplan. I had a lot of creditors at the time and they all accepted the offers. In 2007 I got a letter from natwest stating they were going to put the account into default if I didnt pay on time. they never and continued to accept the payments from paylan. Then in 2009 they put the account into default with no warning whatsoever.

the debt is all paid off now but as they filled the default in 2009 it is going to stay on my file until 2015 which is very frustrating as im working very hard to rebuild my credit.

I have also had an account from virgin media put on my file that dates back to 2006, it has only just appeared on there. The default is due to come off in December of this year but again can they still do this as I would rather this not on my file as the last remaining accounts (apart from natwest) will fall off by October.

Thanks