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Leave the leaves. They need the leaves to replenish the plant from all of the energy it lost producing flowers. If you are not in the tropics, you'll want to find a way to bring the plant indoors for the cold months. Also, following GardeningKnowHow's tips on Amaryllis care: https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-care-instructions-how-to-care-for-an-amaryllis.htm

Can you present a photo of it? I know that florists and growers these days tend to sprinkle glitter on flower petals in order to entice more people to buy flowers.

If the bulb is producing leaves but no flowers, it was probably too small or young when you got it, and didn't have enough energy to bloom this year. But, it still has the potential to bloom later on, so you could plant it in soil (indoors or outdoors) and let it continue producing leaves. If there are no leaves at all, the bulb is probably dead.

It appears that you have an Amaryllis bulb.

Here are some links that will help you care for this lovely flowering bulb.

https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-care-instructions-how-to-care-for-an-amaryllis.htm
https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-bloom-again.htm
https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-outdoor-garden.htm

With this disruption in the bulbs root system and with only one flower remaining, I would just continue care and allow the plant to die down naturally and go into dormancy.

Your bulb will return next year!

These links will help you.

https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-care-instructions-how-to-care-for-an-amaryllis.htm
https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-bulb-storage.htm
https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-bloom-again.htm

An amaryllis flower stalk that tall suggests that the plant got very little light. Small, dried up blooms can be the result of indoor environments that are quite dry. Probably not much that you can do for this plant now. (Unless you live in a no-freeze area and you want to plant outside and wait for future blooms.)

Suggestions for next time: keep the plant closer to window. Turn the pot every few days so the stalk grows fairly straight. And perhaps add moisture to the air by adding a saucer with pebbles and water under your pot.

One other thought - many times the bulbs purchased from big box stores have been sitting for weeks/months in dark kit boxes in the store's dry air. These plants are unlikely to perform well. Bulbs purchased from reputable online sellers can be climate controlled until purchased and therefore start out in better condition.