Cancelled policy but stop order still going through

I cancelled my funeral policy on the 26 September 2018 and I was told the stop order it will still go on for two months, now it’s January old Mutual they took 2 months subscription from my payslip I tried calling they’re call center but useless because I didn’t better feedback I have sent emails I didn’t get positive feedback even two I still don’t have positive feedback nobody knows what’s going on I have forwarded the payslip to the to check what’s going on but they’re never confirmed anything this have been going on now for three weeks I still don’t have feedback on what’s going one they’re call center is useless and it’s full of the guys with attitude