Unauthorised transactions and I want a full refund

I have been charged $69.80AUD from your company. I have also been charged $58.30AUD from AVAST which from my research is associated with your company. I have never used any of your products before and had to create an account just to post this. I want an explanation on how you got my banking details, how you processed a transaction without me having an account, and I how this while thing occurred. I also expect a full refund in a rapid time.

Hello Craig,
Thank you for contacting AVG support community.
I apologize for the trouble caused.
As it isn't advised to discuss personal/account related info here, we've sent you an email with further details. Please check your inbox/spam folders to find the email and use it to get back to us.
We will certainly help you out.
Thank you and keep us updated.

Hello Craig,
Thank you for contacting AVG support community.
I apologize for the trouble caused.
As it isn't advised to discuss personal/account related info here, we've sent you an email with further details. Please check your inbox/spam folders to find the email and use it to get back to us.
We will certainly help you out.
Thank you and keep us updated.