Rain internet has taken my money after acknowledging cancelation of my subscription

Rain has deducted money out of my account even though they acknowledged the ending of my contract with them ref number ***. They now refuse to respond to my emails and have not refunded my money. I am not sure what **** rain is pulling. Surely if this was done in error, a response and refund would have been done right away. Instead they ignore emails. They don't answer calls. Then the phone number says it's incorrect. They have taken my R739. And I want a refund!!!!!!