Had exactly this problem the other day with DPD, delivery attempted when he had been nowhere near, luckily with DPD they have customer service phone numbers and after a polite but forceful rant i got no where.
Called back and tried a different approach of wanting to speak to the depot manager to make a complaint about a driver, finally got through to him and stated the driver had lied, been nowhere near and i wished to complain, five mins later after speaking to the driver he calls back and says the driver is turning around and will be there shortly, after another 20 mins a rather unhappy looking driver turns up with our parcel looking very sheepish and apologetic
Never had that success with Hermes though as they only have automated online chat and that is next to useless, now if people state they ship with Hermes before i buy , they loose my custom and i buy elsewhere