Greenbacks costs money

Do not subscribe to Greenbacks. I was called asked to join no fees. Next thing I get an sms to collect cards, I tell them I didn't ask for new cards and I am not paying for new cards. They assure me no costs for the new cards. 2 months later I get double debited for card maintance fee. I immediately phone to dispute they tell me I will be refunded in 2 - 3 days. A week later I have not been refunded. I have been phoning everyday and everytime I get told someone will call me back. How am I suppose to feel safe putting money into a bank when the bank deducts money from my account without authorisation.