Parcels just not being delivered

Spent hours on the phone over multiple days trying to get hold of anyone who can assist. All my attempts to speak to them were useless. Emails, online messenger, etc. ... They don't answer or give feedback. A driver called me once in last week. He was at the wrong address. As agreed, I texted him the correct address. Instead of rescheduling the delivery as promised, the parcel was taken back to the depot where it has been now for the last 5 days.