The Courier Guy terrible service

The most awful service. I booked an over night delivery with The Courier Guy and 7 days later, the parcel has still not been delivered. I have not received any help, no apologies and no where closer to resolving this issue. As a small business, my client service is of utmost importance and it looks really bad on my business if my parcels don't arrive when promised. Will definitely not be using this company again.