DSv Courier not capable of finding his way to a delivery unless

I purchased a wifi contract through MTN and was called by DSV that they would deliver my parcel 3 x days ago. Again I had to call them to find out where my parcel was yesterday but they gave an answer of the drive has told them the my fingerprints did not work but to my surprise the driver never came to do the deliver . I did Send a customer complaint to there email address to complaint about this situation . The response from them was when I gave my tracking number they could not find it and asked for my ID number which I did supply and still no response. I did mention in my complaint that how can the driver say my fingerprint did not work when he did not even pitch or phone as it was said would happen. I have been stuck at home for 3 x days waiting for this deliver and call now at 10.30 to track my parcel and voice recording says that they do not work on Saturday's. Now I have no way as to track my parcel. The message sent to me with the tracking number and website does not work this is so frustrating.