Security/Privacy Concern/Poor Service

I have recently been receiving strange calls from numbers claiming that my number has been calling them and then hanging up.<br> I am positive that i have not been calling these people intentionally or unintentionally. At first it happened on rare occasions and i brushed it off thinking that the people on the other line had simply called the wrong number but this problem seems to be increasing with phone numbers i had never seen before contacting me in all hours of the day and night. If i answer i find that the person on the other line has had a number of missed calls from my phone to theirs which hangs up as soon as they answer. <br> My concern with this is of course the fact that my number is phoning these people with no way of me seeing a record of this which leads me to question the security of MTNs network and the security of my personal information. i.e. if people can make calls from my phone what is to stop them from accessing my banking app or mirroring my account on another phone and in curing costs on my behalf. It is the middle of the month and i have no airtime left which is strange. Customer care was useless and none has helped me in any positive way. Go to Vodacom!!!!