DPD announces 3 days in a row that 3 parcels will ...

DPD announces 3 days in a row that 3 parcels will be delivered. The status on the 3rd day means that the parcels will be taken back to the warehouse by the 4th! Day to be delivered. I happen to see that despite my forced uninterrupted 3-day presence at home !!! the package was given to someone I don't even know! Live tracker does not work, service phone stops in the middle of the announcement. Complaint emails are initially dismissed with the usual wording that I read everywhere on the DPD website. I hope that this disaster will end.