My husband is in the shielded group and we signed up for priority slots and also ended up getting the parcels. It took a while to stop them, went back into the website as they said to do, another one came the next week so my husband rang the council, they couldn't help, said to refuse the next one, but yet again we didn't see anyone, it was just left on the doorstep. The following week he hung around waiting for the delivery man, and what he said was if we refuse it we wouldn't be able to get any more parcels ever again, not that we couldn't get delivery slots. We refused the parcel and still get the priority slots. It's such a waste though, sending out to people who don't need them with out having a proper method of stopping them!