what a joke -number allocated to someone else

I have had an MTN number for about 16 years. I then changed it to a prepaid as a result of having obtained a different contact.<br> <br> ALL of my personal information including bank balances id numbers and OTP's are sent to this number. This morning i have found out that the number is allocated to someone else and someone else is using the number and thus receiving all of my personal details.<br> <br> How is this legal. I have been calling their contact center for an hour and i get cut off as the *********** staff try and transfer me as they have no clue of what they are doing.<br> <br> The implications of this sort of reckless actions is unthinkable..