Tfg tries to de***** me

I am being ******. I went into fochini 28 march. Paid over 5000 to have my account closed. I was assured over the phone and to my face i wouldnt have to pay another rand and my account would be closed on the 13th April. Today i got a warning to say my account is in arrears. For cell phone insurance? They have wasted my airtime again to be on hold. Now can someone help me ?