Disappointed with Aramex service

So disappointed at Aramex South Africa, they received my parcel on the 05 October but they still haven’t sent the invoice. When I call they tell it’s waiting for customs clearance which is supposed to take 3 working days n it’s been 5 working days. They told me the customs clearance delayed but they don’t say why . Was expecting the parcel by Tomorrow, obviously that’s not possible anymore, Aramex is failing us , they act like their services are free. M very disappointed n frustrated ryt now