reserch

good day I don't want say bad things yet can you please tell me if this yello mobile is a legal company or not .secondly they call and offered me a contract of cell phone and we are agreed of R180 A MONTH when the call me to conferm they told me its R274 I rejact it but now there another company with a name of luno they sent a mail of they will deduct money from my account why is like that .please respond