To the point

Emirates has increased its excess baggage charges on routes
where the weight concept is applied. The increase is dependent on
the routing; for example, CPT-LON has increased by R90 to R690
per kilogram. Agents can purchase an excess checked baggage
allowance online for 30% less when managing an existing booking.
Excess baggage rates for journeys where the piece concept is
applied (flights to/from North and South America) are not affected.