Unauthorised transactions

On the 27th of July i visites vslots ukhozi haming in alice and purchased 3 beers worth R90, got my beers drank then left. On the morning of the 30th july around 7:00 am a purchase of two R90 went of on my account and that time the place is not even open they open at 9am. When i went to the manager she asked for my statement and my statement indicates that on the 27 they deducted the R90 and on the 28 another R90 went and again two more times on the 30th. And the manager said there is nothing they can do. In this instances i dont even know what to do, so much money lost in this economy!