Overcharge

I opened a new line with Axxess on the 13th of July and made full payment for my line and it was activated. To my surprise they deducted money from my account again on the 1st of July, when I complained the consultation said they will send my request to the technical team. It's been two weeks now I haven't received any feedback about the issue ad I'm afraid money will go off my account again and no one will be able to assist!!!!!