bad service

Good day <br> <br> My Name is immaculate I have a foschini account I had a one 2one sim card discount airtime, I cancelled the contract and I was told that the contract will expire on the 09-09-2015 of witch it did not happen on that day it happen on the 24-09-2015 , I contacted the contract center and I was told it will take 24 to 48 hours for my number to be changed to prepaid till today my sim card is not working no one came back to as promised I went to mtn out let and I was told that my number is still topup will the foschini group, I'm so disappointed and angry and I had 1 gig data that I bought on the 21st of August