back part of ion that screw on cracked.

The back part of my ion that screw on to seal it cracked, where can I have it fixed in South Africa please, and how will I know if it is still working?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0