It matters not. As this is a DCB Legal issued claim for ECP, a claim will be forthcoming. If you follow the advice given here, it really won't matter on what basis you are defending, it will eventually be discontinued.
They rely solely on recipients of these claims to capitulate and pay them as soon as litigation is initiated. They will hang on until the last possible moment just before they have to pay the trial fee and if the defendant hasn't caved, they will discontinue and go in search of lower-hanging fruit on the gullible tree to try their luck with.