Data card that has not been working for the past 2 months

I have a data line 20gig, which has not been working for the past 3 months now, I have tried contacting telkom on the website whereby you choose to chat to an agent, they might as well take this feature off as when you fill in your details and press the submit button to be routed to an agent it just kicks you out, thats useless, the data card that I have is useless because i cant even use the data on there becos when i put it into a wifi router and connect to it my phone does not work, I want this sim card and contract cancelled as it is due for cancellation, can you please see to it that it is done and can you take the chat to an agent feature on your website off as it is as useless as your data card the number is ********** 053, and it is for Ruwaida Loonat, 2 Kersboom Road, Randpark Ridge, Randburg, 2169