Dawn Wing - pathetic service

As an online retailer we rely on our courier service to deliver to our customers. Dawn Wing has disappointed numerous times in the past 3 weeks: packages not delivered to the correct address, call centre agents and drivers blatantly lying to us regarding collections and deliveries, etc. Even worse, the customer (i.e. us) get no notice of anything pertaining to our parcels (as other courier companies give), so when our clients don't receive their parcels and call us (as vendor) then we have to follow up with Dawn Wing (sometimes taking up an entire day from morning till afternoon) just to resolve an issue. Overnight packages being delivered a week later, due to "excessive deliveries", yet we get charged the overnight rate! And this after a 22% increase in their rates! Absolutely preposterous!!! Then we get to service from the call centre - nobody seems able to actually assist, and refuse to provide details of senior management. Formal complaints were lodged at the e-mail provided, yet to receive any reponse a week later. Pathetic service all round. Pity I have to give at least one star, because if I could I would award negative stars.