Buy a proper adapter. The CEE 7/16 "Europlug" (Type C) is a standard registered plug, however manufacturers (especially in Asia and Russia) really apply the standard loosely. I believe that our move to IEC 60906-1 from the old BS 546 (SABS 164-3) standard is mainly due to SA being part of BRICS (Brazil, Russia, India, China and South Africa) where Brazil and Russia predominantly use IEC 60906-1 and CEE 7/16 sockets respectively.
Prepare for LOADS of cheap Russian and Brazilian power products in the near future