What do I have to do to cancel, request was done January 2019??????

Can someone at Telkom please explain to me how many times do I have to ask for my ADSL line to be cancelled. My first request was on 30th JANUARY 2019 and still I get invoiced!!

I've phoned, I've mailed you guys, I get sms saying my query have be resolved but still get's invoiced!!

What do I have to do to cancel??????