After recovering from the surprise, you'll ask yourself the classic question: "What can we do?" After all, the thing that comes with this "bonus", it is absolutely unusable. As corny as it may sound, but the best solution in this situation will be another trip to the store with the purchased thing and cash a check. The seller in this case he will remove the magnetic tag, and perhaps even apologize or offer a small bonus as compensation for the lost time.
But what to do if the item was bought on vacation and the magnet you were able to discover only at home, or for any other reason you are not able to return to a store you need. Of course, you can go to nearby stores and ask the sellers to enter into your position, but the chances that you will meet a little. First, it can be strictly prohibited by the internal regulations of the shop, secondly, the device for removing tags may not be suitable to your magnet, and efforts will be wasted. Do not try to break the magnet with a hammer or to influence him the other brute force. Inside the magnet may be an indelible paint, which you irrevocably spoil a thing.
But there is a solution. You can try to remove the tag yourself, and all you will need is a strong magnet. Best for this purpose, suitable magnet, extracted from non-working hard drive. Broken disk, if necessary, can be purchased on the collapse or the radio for 50 rubles. Usually the magnet attached to the body, so the pen blade is thin but sturdy knife between the plate and the housing and apply some force. Separated the magnet will attach to the end of the convex portion of the tag, in most cases, the tag immediately can be removed without problems. If at first nothing happened, then invert the magnet and hold it close to the tag the other pole. Maybe the magnet does not have enough power, so you have to look stronger, but usually the above method works without any problems and delivered the thing for a couple of seconds to become usable for their intended purpose.