frustrated and stressed

I am so disappointed, i took a jet funeral policy which i cancelled after i realised i had a lot on my plate. Now whats sad isi am receiving intimidating messages from vvm. i went and paid R500 but they still tell me i owe them. this is a funeral policy for heavens sake. why am i owing worse when i have cancelld it. My nam is Sbongile Maluleke. ccontact number ***.