Caller: Done known

I have received two missed call along with a voicemail two days in a row from the above number. The first time the message was in Chinese and in fact a message was left in Chinese [you'll understand why I named a particular country] and the second voice mail today was in English asking the recipient to press 1 for English and 2 for Chinese, with no other message.
I could only delete the number from my iPhone as it didn't enable me to delete OR "delete as spam" So this is just a warning.