TWX Magazine review: unapproved charges

I found charges on my bank account that I had not approved. Called them and said it would be taken care of within 24 to 48 hrs. Did not return full amount and same day another charge was made to my account from the same company. Here we go again. I don't understand why it is so easy for them to go in and chg my account, but it take days to replace it.?!