Charged on no services rendered

I have sent a tender documents through Postnet for next day delivery on the door to door package, which stated that it must put in a tender box on delivery. The driver from Courier IT which I just found out that the company used by Postnet, call me and advised that there are four building at that Transnet address and I advised that he ask the security which one he should go and drop the tender to and that was it. I thought everything went went, and I just found out when I traced the waybill that the driver took the parcel back to their branch and there was no communication what so ever with me. The tender is closing in 1hr and they are telling that they will bill me again to go deliver parcel again.

My question is why do you render services that you know for a fact you are un able to deliver on. The address is correct, the parcel instruction clear say it must dropped in a tender box but it's seating at your offices. So which services did you render to me.