Fedex appealing service and high rates

Fedex service in South Africa is appalling. I have been getting the worst service and this is on my business acorn t sop in actual fact, its affecting my business. I created a shipment last week which isn't easy to do online so I have to keep going back and forth on emails with the reps - this was a week ago and the parcel hasn't left the country (parcel is still not in transit and the Reps were not aware off this). I was then charged a very high rate based on my volumetric weight yet waybill actually indicates weight is smaller than the one I am charged for and Fedex claims that they can't adjust the rate. Secondly, the rates are ridiculous. What would cost me R1300 with DHL costs me R5000 with Fedex and you know why? Apparently I am being charged on "International priority". When asked to be charged "Economy rate" this is the response I ma getting from Fedex - "System auto selects services therefore we are unbale to change as even if we change collection date it gives IP service.".

I tried calling the call centres and none of them are able to assist I am simply redirected to my Sales Rep who only communicates via email and provides me with short answers. Please how can I get quoted on Economy rates? This is insane and when can my other parcel be shipped as its already late now.