Please advise whose number as i think it is a scam

I just got a call from this number - offering a R10 000 holiday voucher which they'd send for a R399 admin fee. She told me the company name but the line was bad that I didn't hear it. I asked her to repeat it but I still didn't get it. I ended the call after they asked me to confirm bank details. I've just tried to call the number back but it cuts off. Chantal, have you heard anything further?

I also receive the same call and she aask me to confirm my bank details I ended the call , she again call again and I ask her why she want my bank details because u said I win the voucher she said for security reseons , I ask her the name of the compony and the landline number she get angry and ended the call, I didin't gave her my bankdetails.