********** transaction on my card

I approached the teller to perform 3 transactions with my companion, only one of which was related to my own store card (othertransaction for aunt, othertransaction my companion's card). I handed my card to the teller and effected an account payment on my store card. As I stood with my card in my own hand, waiting for my companion to finish his transaction/s, the TELLER SNATCHED MY CARD RUDELY RIGHT OUT OF MY HAND WITHOUT MY LEGAL CONSENT/PERMISSION, and she proceeded to swipe my card for a transaction totally unrelated to my store card and for which transaction I gave nil legal permission. This amounts to *****, as it is usage of my credit card without my consent. I immediately objected, and a supervisor standing by DEFENDED THE TELLER'S ACTIONS and REFUSED to reverse / cancel the ********** entry on my store card, in my presence. Both teller and supervisor then turned on me, arguing about my right to give consent for transactions on my card. The teller then AGAIN wanted to snatch the card out of my hand for the third transaction, by which time I asserted myself and firmly put the card away. I am ASTONISHED that staff can use my store card WITHOUT MY CONSENT to perform transaction