Avast - An Anti Virus Company that hacks you and *******ly takes money from your account.

I recently contacted Avast Anti Virus with regards their Premium Security Product. I then noticed that R679,00 had been deducted from my Debit Card without any approval from myself. What is more worrying is that I have purchased products from Avast previously but only using my Credit Card. So how exactly did they know the number of my debit a card without hacking my computer . So its not just taking money from me without my knowledge but hacking my computer or my bank account. One really would not expect an international Anti Virus company to take money without approval but also to hack my computer. I really would advise everyone to have nothing to do with this company as they are more likely to be hacked than to supply an anti virus product.