Incorrect upgrade 3 times, now not calling me back

Cell C upgraded my contract incorrectly 3 times, sent the second upgrade to my husband's phone after I pointed out that he received an sms from them confirming the upgrade. The third upgrade incorrectly sent me airtime, sms's and data incompatible with the type of phone I have, knocking out my BIS which they now cannot retrieve. They agreed to give me 1 month's free subscription which I was meant to receive a week ago - still not a sign. I have left countless messages for Jakes the Team Leader in Retentions Department which he has still not responded to a week later. <br> <br> So here I sit with no whatsapp, no internet and no one calling me back to sort this out. Its a very powerless feeling. I cannot have these inefficient people managing my cell phone account.