Billings needs to explained

I had a contract that ended on the 6th of November when I called in asking for the settlement amount today I was told of a huge amount that I wasn't advised of initially when I called wanting to cancel the contract and when I asked the agents to explain to me how it gor to that big among which is almost 3 times what I was advised about they couldn't. The agent from retentions put me hack through to customer care and advised me that Billing department will explain and have a break down for me for that specific contract. On the customer care line I spoke to Thandeka Khoza (not sure of the name but the surname could be right) that girl was rude to me and I want something to he done. I want someone to also call me and explain to me in detail how I was billed for a contract that ended on the 6th of November cause I was told am in arrears of 60 days wherelse I paid the contract end of September when I got retrenched. I have also since been waiting for an email from Senzo (an agent on post paid) who also could not explain how I owe that much. I have 2 contract one will be ending now in March and after this I don't want anything to do with Cell C anymore.......