Had the same problem with DPD. They claimed to have delivered a parcel while I was out. Photo of a totally different house. Came to investigate a few days later, claiming to have video of parcel being delivered to my house and a girl taking it in. Said I would call the Police as no one was in my house and if they had video of an intruder stealing parcels that was a crime. They declined, but still claimed to have delivered it to the company. Provided proof including GPS stamped photos of my family in a totally different place but they still wouldn't give me a refund. Spoke to bank, emailed photos, had money back in 5 minutes.
Delivery companies are taking liberties using Covid as an excuse. Caught another driver on video throwing parcels out of his van from several houses away.