FedEX- Atrocious "Service"

FedEx has got to be the worst organisation to deal with. My package was scheduled for delivery on 12 August 2020, however, on 13 August 2020 I received an e-mail from one Nicole Haynes(FedEx) stating that the package was randomly selected for review/inspection from customs, OR Tambo, and documents were required(proof of purchase and payment, commercial invoice for the commodity, order form, packing list etc) all of which I forwarded to her the very same day. Thereafter, communication just seemed to stop...I would have to e-mail and no response....at this point it has been handed over to another employee, Cherzal Subramoney, who's only feedback to me is that there is no feedback from customs.

What do I do now?...How do I even know whether or not my package is being enjoyed by one of the FedEx or customs staff, ON MY EXPENSE!!.

Service like this is atrocious and reading the previous complaints on FedEx, I become very worried feeling that I may as well just flushed money down the drain. It also appears that FedEx have no intention of addressing any of their customers complaints.....what a shame!!!