This company has no morals what so ever

I had been with this company for a couple of years with no problems,
then about a year ago they advised me to go with a company called chess telecom, with whom they had done sort of deal.
after a number of months Damtel then got in contact and stated that Chess was not a good company to deal with, and asked to come back to them.
this I did but there seemed to be some major in fighting between the two companies.
In January this year another company (Nine Telecom) wrote to say that Damtel was not paying the monies owed to them, and that I should switch to Nine Telecom otherwise the phone line would be cut off.
I informed Damtel of this letter and they said it was a scam.
Finally my phone was cut off by Nine Telecom. Although through communications with Damtel they said it was a fault on the line
after a few days and a loss of £188, I had no choice but to switch to Nine Telecom on a rolling contract, within ten minutes my phone line was back on.
Damtel still do not recognise their actions were completely wrong.
I'm still getting correspondence from Chess telecom for unpaid bills
Damtel today have issued a letter before CCJ claim also for unpaid bills.