sms received claiming i had won R175000.00

Received sms. Congratulations !! Your Mobile Number won R175000.00 in 2013 global mobile promotion. Ref No 119NKP to claim your prize contact Mrs M. Lindiwe on 0787759133.
I phoned and Mrs Lindiwe answered. I then enquired what was needed to claim prize and she informed me that
she needed my Bank Details which i did not give and informed her that i thought this was a scam, she was adament
that it was not. I then informed her she could have the prize as I would not give bank details as I could become penniless and
she could be driving around in a Merc to-morrow with my hard earned money.