Joy Williams, 23, from Thamesmead, was described as a 'caring and funny' girl who was 'loved by everybody.
She died on October 23 after travelling to Bangkok to have £2,000 buttock augmentation surgery.
Speaking yesterday from his home in Lagos, Nigeria, Miss Williams's older brother Anietie, 28, said he had been looking forward to her visiting him in Nigeria this Christmas.
He said: 'We don't really know what went wrong, we only know what is in reports in the media.
'She was a very nice and caring person.
'She brought joy to people's lives.
'She was a beautiful girl, loved by everybody. We will miss her so much.'
He added that the family were still making preparations to bring Miss Williams's body home and