With cellc the nightmare never end !!!!!

I could not wait for my contract to lapse,I was so relieved to finally write a letter to thank cell for the miserable time I had with them as my contract ended but little did i know that the nightmare had only began.This *****s kept taking more money off my bank account and I kept reversing it until they called me saying I m in arrears of R841.00,I told them that I dont owe them a cent since I DID NOT UPGRADE,but they told me stories that I took a phone so I demanded the prove but they failed to provide me with prove but they told me to send along an affidavit stating that i never took a phone upgrade i did as they requested and they told me they will let me know when they done with their investigations,while i m still waiting surprise,surprise i have this people saying they from shabir shaick whatever demanding that i pay cell ******c a whooping R7900.00.where do this cellc get off messing with people like that mara?I told those people to go to hell as i m not gonna entertain their games....