After helping an elderly woman load her bags into a mini-bus taxi at a busy intersection in Soweto, a scrawny and strung-out young man is rewarded with a few coins for his efforts. Heroin has been wreaking havoc in South Africa's cities and rural areas since the early 2000s, according to a recent report by ENACT, an EU-funded project against cross-border organised crime. From the moment when you get the fix, you forget all the problems," said the nyaope user in Soweto, a township on the outskirts of Johannesburg.