I need to know from where is this no coming from

I received a call from this number just now but the caller did not say anything.

Its call from maxis. Broadband promotion.

Yup..i also recieved  from this no...the lady said from maxis & also mention my full name..

I received a miss call from 60367309016 today 13th Aug, I returned the call, strange I heard the ringing tone but soon followed by voice mail,  "the number you have dialled ..."

They said themselves from Maxis. They want get some info from me because their system is down, so they can not get my details. Besides that, they keep offer the promotion through phone call. Once I replied that I do not want that offer, they straight away end the call. Very rude attitude. Maxis have to aware on their staffs attitude and service.