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Sowetan has learnt that Yfm management has given Ranaka the ultimatum after she broke down on air.
Sunday World has reported that Ranaka was having problems with the youth station's marketing manager, Tamaria Motsepe, which was the cause of her meltdown.
During the J&B Met weekend in Cape Town Ranaka went into a tirade on a bus, where she allegedly swore at Brenda Ngxoli and Palesa Mocuminyane.
Ranaka, who also hosts e.tv's Club 808, reportedly told Ngxoli and Mocuminyane off when they reprimanded her for complaining that Kenny Kunene took her friend and colleague Faith Mangope to Mzoli's Buy and Braai Butchery in Gugulethu.
Ranaka, whose Afternoon Drive Show has since been taken over by content producer Bujy and co-host Linda Mabaso, is said to have been struggling with drug addition since last year.
YFM staff, who spoke on condition of anonymity, confirmed that the station had ordered her to go to rehab.
"She was told to check herself into a rehab or leave the station. She was losing it. YFM had to do something," said a source.
Another staffer said an internal investigation discovered that a well-known DJ at the station was selling drugs to colleagues.
"The DJ, who is also said to be a drug addict, is selling drugs to them on credit."
Our informants added that another high-profile DJ at the station was supposed to also check into a rehab before Ranaka, "but she can manage her addiction better than Dineo and another one who was fired last year".
Asked for comment, an angry Ranaka said her life was not that "interesting for me to end up in rehab".
Efforts to get hold of the station manager, Kanthan Pillay were unsuccessful.