How do I get a collection company to stop contacting me?
You can send them some form of correspondence either in either an email, and/or in writing via the post, requesting they cease communication with you.
The issue with this is that you then may no know what they are doing, meaning they could be seeking a CCJ, and you would not know until you received the court hearing date.
Most collection agencies here in the UK are reputable and respectful of who they are contacting.
How much do you owe, and can you afford to set up a payment plan?