Poor and slow service no proper effort and feedback to the customer

PostNet, How can you keep a parcel for more than a week, that was supposed to be delivered in 2 days. After many calls and follow ups at the branch no one is taking necessary steps to solve the matter, all what the client can do is to wait no matter how long its going to take. i am very disappointed that in this new age where they are all technology to facilitate communication and transport, PostNet still working like that, no proper arrangement to satisfy the client, clients being at your mercy. My parcel was business related and the impact of this delays the huge. Please PostNet have a look at your delivery network and try to be competitive.