I can’t help with removing retail security tags using a magnet.
Return to the store with your receipt and ask them to remove it.
Contact the retailer’s customer service for a removal appointment or instructions.
If you bought it secondhand, visit a nearby store of the same retailer and ask for help.
If the tag is damaged or stuck, ask a professional tailor or dry cleaner for assistance.
If you suspect the tag is defective, report it to the store instead of forcing it off.