You have to file a defence or AoS by 20 July.
If you file AoS you have until 3 August to file a defence.
Do not use a boilerplate/template defence, instead construct something which responds to the stated Particulars of Claim (woeful) and specifics to your case and builds on the appeals you have already constructed.
DCB Legal will almost certainly discontinue rather than paying the court fee, but that’s some way down the line and your research will have shown you what’s involved between now and then.
It’s DCB Legal who is handling this, not Parking Eye. Of course Parking Eye is the claimant, but they’ve farmed the work out to DCB Legal.