Hi Sarah,
I have been using MyHermes for a number of years and have found them very reliable. However in 2013 a parcel went missing and their help desk was able to contact the courier on his hand-held device while I was waiting on the phone.
I have looked, but can’t find the phone number I used, but looking on-line at MyHermes, Leeds, I see they have a webchat service open on a Saturday. Give them a try !
