If you can just forget about it and let CCCS deal with CSL.
Remember you have the law on your side. These DCA's have to behave in a certain way and if they don't then you can report them to Trading Standards via Consumer Direct.
Don't worry about them visiting your let property. This is not something DCA's will do until much later in the process and only if they are not receiving any payments or response. CCCS will have started to deal with CSL, before it would have got to that stage.
In regard to the various debt forums you have to be a bit careful when reading the various threads. Some are started by DCA employees with made up stories, saying how certain companies have operated in an underhand way. People with debt problems read these and this just worries them to the extent they enter into payments they cannot afford. My advice is to stop reading these and let the experts at CCCS handle DCA's. If you are contacted, just give them CCCS details and advise them they should not be contacting you.