******** deduction of insurance premium

This is the worst experience Insurance wise. This morning I enquired why a premium was deducted off my account. The explanation given is nonsense, I understand the telecommunications industry thoroughly. I want the premium refunded that was deducted ********ly, I cancelled my insurance with Pinnacle back in October 2017 and now a deduction on the 31st May 2018. My account migrated form Autopage to MTN on the 1 March 2016 and all insurance premiums were paid on my MTN account up to cancellation October 2017. I want my refund. This is the second bad encounter with Pinnacle in 8 months, and I've not even had a claim with them, thank you I will never have to find out either.