RAIN DID NOT CANCEL SIM ON PURPOSE SO THEY CAN CLAIM I OWE ANOTHER R699

How is it my fault that an immediate cancelation was not done! I paid on the 30 june 21 and cancelled 4july . no one called and thats the reason I called.I logged several tickets and the reason I called was to find out why they haven't phoned to schedule someone picking up the router . then I'm told my cancellations has not been done and I owe r699 for something I did not use . coz I plugged it out and packed it back in the box. Yet if someone had actually responded to my ticket on the 4th of july we could have sorted this out right then . I sent several tickets no one called now i owe r699 .I'm sorry I do not agree with this . they should have canceled it but claim they sent emails so why have I not received the emails in question also why would I not respond to something that I'm waiting for? I think rain does this on purpose. Coz I canceled 4th july and only coz I called today im finding out i owe them suddenly even though I canceled . I need a manager in billing to call me asap.