MY AIRTIME GONE WHILE USING BIS

I called the call centre and I got very poor service I kept on being cut and was asked to rate the service before I finished.<br> <br> My problem is that I bought airtime yesterday and I'm using BIS and had data as well and been going to internet normaly as I usually do but in the morning my airtime gone has haven't made a call and was told that its because of internet but I kept explaining that I'm using BIS and Pearl Ndimande told me that she is unable to transfer me to anyone as she is in high end call centre and the manager is not there and no one is deligated the role of a manager they manage themselves. And she can only escalate my call next month because I'm a prepaid user.