Vodacom incorrect billing

My bill is over stated, it is reflecting that I owe R1070 when I only owe R812. I canceled my insurance in the way advised by one of their agents in May, and there is q bill the app is saying went unpaid but I've paid my bill every single month I've never missed a payment l. Please can vodacom check their records and correct their invoice, I will not pay more than what is really due, Fibre is R687 and my phone is approximately R182