Does South Africa have a law whereby your jail-time is revoked after a sure time upon a run?

If we have been condemned to prison for (thumbsucking) attempted attempted murder in south africa, can we go upon the run as well as have your judgment dissolved after the sure series of years, such as Ohio’s law whereby if we equivocate constraint for 7 years, after which time we have been free, postulated we had no misdemeanours in which time? It’s urgent, though utterly hypothetical!!! Thanks!