You need to go to court with a statement of claim.
However, I would like to inform you that according to Art. 9 of the Law "On the Protection of Consumer Rights", the consumer has the right to exchange goods of appropriate quality within fourteen days, not counting the day of purchase, unless a longer period is announced by the seller.
There is a list of products that cannot be returned. The list of goods of proper quality that are not subject to exchange (return) includes food products, medicinal products and means, sanitary items.
In addition, the List includes the following non-food products:
photographic films, photographic plates, photographic paper;
corset goods;
perfumery and cosmetic products;
feather and down products;
children's soft toys;
rubber inflatable children's toys;
toothbrushes;
mouthpiece;
shavers;
ointments for shaving;
combs, combs and massage brushes;
mutes (for wind musical instruments);
violin chins;
gloves;
fabrics;
tulle and lace fabrics;
carpet products by the meter;
underwear;
bed linen;
hosiery products;
goods in aerosol packaging;
printed publications;
linear and sheet metal rolling, pipe products, sawn timber, trim (plinth, platband), slab;
materials (wood fiber and chipboards, plywood) and glass, cut or cut to the size determined by the buyer (customer);
audio-, videocassettes, disks for laser reading systems with recording;
products made of natural and artificial hair (wigs);
goods for babies (diapers, nipples, feeding bottles, etc.);
tools for manicure, pedicure (scissors, files, etc.);
jewelry made of precious metals, precious stones, precious stones of organic formation and semi-precious stones.
Consumers have the first and foremost right to exchange the product, so if you want to return the product and get money, your arguments should relate specifically to impossibility of using the product for its intended purpose.