Dishonesty

I have an account with homechoice which am currently paying an amount of r342 a month on the 06/01/2018 I ordered goods but than I called on the 08/01/2018 to cancel the goods on the 09/01/2018 I received an sms saying I must pay and when I analyzed the sms they want me to pay the goods that I cancelled, I called them and the call center agents were rude, today I have received an email containing the same contents as the sms, how am I expected to pay for things I don't have?