worse service ever

<p>I have a contract that expired March 2017 & a month in advance I requested cancellation & the sim was only used for one month thereafter destroyed as I was informed its an open line contract. I paid the amount due for the month the sim card was used thereafter destroyed the sim but in March 2017 im advised there is usage in the account and in April I am liable for a payment for something I did not use. My understanding since I requested cancellation a month in advance my last payment should have been in March. Why am I being debited in April</p> <p> </p> <p>It gets better I call the call center and speak to Dineo who cuts the call on me due to her not being able to answer my question thereafter Yoliswa the Team leader tells me she will send me statements reflecting the usage on the account but my question is how do I use a sim that is destroyed and why use it on the 24th month when it has not been in used for 23 months.</p> <p> </p> <p>Cell C I want answers...</p>