Looks like the finally woke up. Just received a second email from QQ:
Thank you for contacting us regarding your account. Our records indicate that you have a past due balance in the amount of £570.17. Unfortunately, we are not able to accept your offer to pay £20.00 per month. If you are working with a Debt Management company, please forward all of the following Debt Management details to us: Name of Debt Management Company, Name of Representative, Phone Number and Reference Number.
Should I reply anything to that?