Wrong information and i dont want to pay more

I called Cell C in early August not sure about the date but not a problem as your calls are recorded to cancel my contract and they said i should cancel in early September as i need to give them a months notice not 2 months, so today i called and spoke to Amelia and she said a months notice is on the 9th of october so that means im going to pay R429 for 2days as my contract ends on the 7th of October thats not fair because i called 2 months before i could not be helped, and yesterday i tried to call Cell C and i spoke to Thabiso at 18:20 and he just transferred me to cancellations only to find out that the call will hang up automatically because they dont work after hours my question is didnt he know that the Department is not working, and i tried calling again at 18:29 and spoke to another guy and he said they knock off at 6pm, so that means Cell C staff is *********** and im not going to pay the October subscription.