Incorrect Billing

I signed up with virgin active back 2017. and because of distance, I cleared my account and paid everything up and requested that it deactivated. I have an email even stating that.

This year in 2019, I get a call that there's R700 that's outstanding. I have asked for details regarding this billing and still no one can provide me with a response.

How am I billed in 2019 for an account i closed off in 2017.

I've sent numerous emails asking for management to call but still nothing.

This is my reference number, I'm still waiting for feedback: CLIENT *** // AJS: ***0