Vodacom insurance

I am realy disappointed in Vodacom, in December I cancelled my insurance with them but then when the debit order went off I was still charged R1195 and then in Jan I raised a query to which they cancelled the insurance again but end of Jan R1195 still went off,indicating that it’s still not cancelled, It’s 2 months now that I need to be refunded for, the previous email stated that they will refund me for December and cancel for Jan and that didn’t happen, can this be corrected please