Parcel sent on the 23rd of October 2017 (using store-to-door) still not delivered

I run a small business and I use Aramex Store-to-Door courier services to deliver orders to my customers. I sent a parcel to Mamelodi Gardens on the 23rd of October 2017 and the customer still hasn't received this parcel, she keeps getting different stories when she's tracking it. This is unacceptable and the atrocious service is disheartening, as a loyal Aramex customer who uses their services daily, I feel I might just need to reconsider my courier option.