very ashamed

I had 70 rand airtime I phone cell c to ask if they can deactivate my bis on my blackberry they deactivate it so I active a new bis then just after that get another sms saying bis has being deactivated so I phone customer care and they say ok we will put it on again (activate) they do activate it get a message its being deactivated again so phone them again I say what's going on they said there team leader will phone me in 2 hour I wait 3 hours still nothing and everytime I phone they give me another answer I am very unhappy with cell c