Vodacom are real ******!

Last year i asked vodacom to cancel my contract. And they didnt. I had to lay a complaint on this platform earlier this year to get it cancelled. It was then subsequently cancelled but i got an SMS last week saying my number will be deactivated if I dont pay. I do not even know what I am supposed to pay. My number has been inactive since last week and now my clients cant hold of me. And they are not responding to my emails