Unreliable & poor customer service

I received my delivery notification and went onto the DHL website to authorize the driver to leave the package at my door. Upon delivery, we were not home and the package was not left. I called into the DHL toll free number 3 different times that afternoon and was told that the driver was notified and that he would return to my house that evening to deliver. The package never arrived. I called in again the next morning and was told it was being resent to my work address between 11am and 9pm. I advised the customer service person that I would be at work between 830 - 330pm so it would need to be there before 330pm. The customer service agent said she would schedule it for 11am- 2pm. At 2pm I called back in and explained my situation. I was told that they would send another message to the driver to let him know that the package would need to be at work before 330pm. I asked the agent what I should do if it doesn't arrive by 330pm and was told "I don't know, wait and see?". These are the vests and ties for the groom and groomsmen - the wedding is this weekend.