Aramex… definitely not a courier but definitely snail mail

My parcel from Shein took 5 days to get from China to Sandton. The parcel, according to the tracking system on Shein has been lying at Aramex since 7 Dec. I have been trying to get hold of Aramex for nearly 2 weeks now. No one answers the phones, and there is 0 response on the WhatsApp line, I have tried numerous times. How can it take longer for the parcel to get from Sandton to Pretoria than it did to get from China to Sandton??