They will want to settle out of court. Do not even try to do so. They will eventually discontinue. If you are getting unwanted calls from them (or anyone) simply block the number.
You certainly don't want any communications from them that is not in writing. A phone call is not worth the paper it is not written on. They will eventually send your "without prejudice" offer. Again, simply ignore them and wait for the N279 Notice of Discontinuation (NoD).
It is up to DCB Legal to send a copy to the defendant. However, they often conveniently forget to do so with the defendant showing up at court only to find out they had discontinued weeks or months earlier. If you've not heard from them within a month of the hearing date, phone the court to check whether they have discontinued and neglected to let you know.
In the meantime, I am drafting a letter to see if the allocation judge will set aside the order for the hearing as they have not issued the order that was attached to the defence. Whether that is because they never received a copy of it from the CNBC or just didn't issue it, we don't know.
Either way, as mentioned, they will discontinue anyway. Always more satisfying if you can get the claim struck out on your terms rather than discontinued on theirs.