Who called from 27000000000

its the third time i have received a call from this number, i answered just once, and i found automated voice saying, please hold.

i also got the call from that strange number telling me i have won a holiday voucher and before the guy hung up he said their company will be able to trace my account number...how do we get rid of this strange people calling us non stop!!! its very irritating

I have a missed call from this number, anyone knows who's number is this?

Got this call today, got a music playing for 20~30seconds then hung up