Cell C complaints

i have been with cell C for the past 3 and half years and had 2 contracts . my first contract ended on 3 March 2019 as per cell c policy i had to call a month before the contract ends to cancell my subscription wich i did and i called on January 31 2019 even got the sms notification stating that my cancellation was successfull meaning from March 2019 i was going to be left with one contract since i had 2.To my supprise Data was loaded in my Account on 1 March 2019 and on March 2 it was reversed and taken back by cell c and i did not even use it cause i had data on my other telkom sim.on the first of March(1-03-2019) cell C debited my account for two contract yet forgetting that im left with one contract and im my Account the were funds to pay for 1 subscription since i was left with one contract.Contacted cell c and ask why am i debited for two contract since i only have 1 and i was told that my contract was ending on the 3-03-2019 thats why i was debited, so i asked but i did not use any of cell c services in March and i was told thats cell C policy,I asked the consulted i was speaking with that there's an issue with the bank charges and who must pay for and i was advised that the bank charges were my burden to deal with.I even ask am i owing anything on my previous contract and i was told that im not owing anything just have to deal with the bank charges.as i write this message my cell c sim has been suspended cause im now owing cell c R251.00 for March services wich i did not use to begin with and im no longer contracted to cell c on the suspended sim.Why must i pay for services i did not use and now my sim is suspended, this issue is hurting me emotinally and Finacially cause the numbers suspended is part of my Business contact.