I would give them 0 rating.
I have been abused by DHL parcel which made my health condition worse. They wasted 10 days of my life so far and still no sign.
Nasty customer service, inexperienced advisors, every time you are put through different advisor with different and wrong information being provided to you, fake reassurance, fake premises, they are full of lies.. they keep lieing to you and pass you like a ball to each other. 9 days in a raw, I have been chasing them for my parcel which was never delivered and lost in the end.. they steal the valuable parcels, the driver does not attend to the address but you receive an update saying we missed you.. they are f..king lying.. even if you request speaking to the manager, they say management will get in touch within 48 hour, DO NOT TRUST THEM . They lie and when you chase them they'll say, oh we believe management has been in contact with you... they are nasty piece of sh..t.
I would personally stick to Royal Mail as they are more reliable than these f....ing company