Bad service and I want my money back😡😡😡

I have been calling this company asking them to cancel my subscription and I was told am on a 24 month contract. Which I was told to cancel it come this June. On the 20 the time 10:41 called in I was assist by the lady called Nokhululekho she told me that she has canceled my subscription and I won't be debited this month. To my surprise I was debited and know am being told that the cancelation it scheduled for next month. Why wasn't told this in May and why didn't they schedule the cancelation for June as I have been asking for it.