Cancelled contracts, nor stopped. billed

I cancelled my cellc contracts on the 20th December 2014 as my husband went on pension and I needed to illiminate debt. I went to cellc in malvern, who told me to go to Umchlanga as only they do cancellations. I went there. Very much out if my way, I told the person I need to cancel my conteacts, he gave me the amounts, banking details and said I must fax proof of payment, wich I did. The debits stopped a while and then started again, when I queried it I was told to fax my proof of paying it up again, wich I did. Many months of faxing, emailing and asking cellc to stop debiting me eventualy got me going to cellc in the pavilion, to my shock they tell me to go to the store that made the error, I refused, they also tell me that i am liable to pay 2800 as i have been reversing the debits, i refuse as i was not at fault. I asked for a nr of managment, they couldnt give it to me, i asked for the ombadsman nr, they dont know it, told me to call the call centre, who also couldnt help. I finally left, more irretated. Very bad service, and they tell me that there is no way to trace who helped me in the first place as they need to be responsible, i must go point them out. I need this resolve