King Price bills you even after you've cancelled

On the 15th of April I was called by King Price to be informed that my account will be debited by them.They aknowledged that I had cancelled my policy (a month ago!) and said it was a system problem on their side.King Price apologised for the inconvenience and reassured me that my money will be refunded the following day (16 April).As I write this message,2 days has passed without the 'King' paying me back.This is ********* and ********** behaviour that can simply be referred to relevant bodies for investigation.When I was cancelling my policy,I still struggled over a month because King Price would always say system problems &promise that someone will call me.As to how the payments system links with the product system,I dont know and I dont care.But I am gradually becoming aware that the 'King' never existed but the ******.Now I am yet again using my data bundles & time to complain about this trouble child.I bet you they are ready for my numerous calls but I willl never bother them,I will report them & if need be take legal action.Was there a system problem or was my debit one of the many to sustain your going concern? If u **** u committed *****,if you did not a huge disservice.