You are the defendant. The claim is defended. Unless you filed a counterclaim (did you?) then there is nothing more to do for now. The claimant does not have a “defence” unless you counterclaimed.
If the claimant has accepted that they intend to proceed with the claim, they will have told the CNBC so but they should have also sent you a letter stating the fact that they intend to proceed with the claim. Have you had anything from the claimant solicitor?
The next thing will be your N180 DQ. It will arrive in the post but you can download one and fill it in already and save as a pdf, ready to attach to an email which is send to both the claimants solicitor and to the CNBC at DQ.cnbc@justice.gov.uk and you also CC in yourself.
If you can get access to your MCOL history, it will show when the CNBC has sent your DQ at which point you can simply email the one you have prepared.