Cell c is taking money from my account!

Cell C! You promised me two weeks ago to get back to me. Numerous Facebook messages saying that you are working on it. I paid you in full a week ago! My contract is cancelled and yet you ********ly took money from my bank account! More than R2000 that you stole! Get your act together! Your service is a *******! I owe you absolutely nothing! I am disgusted as to how a company like you is still operating! You should be ashamed of your service! How dare you ***** from customers?!