Vacuum them to remove the larvae. Spray the cupboard with insecticide - then install lavender or cedar wood to prevent recurrence. Also thin your wardrobe, they like crowded and warm and loathe cold. Normal fly spray won't do I'm afraid - you do need to vacuum first and launder everything.
Don't worry, we had them, treated once, never came back.
They don't like man made fabrics but will go for wool, and variants of wool.
We just had them too. Took lazier approach than whomoved and went straight for cedar stuff. But yes, remove everything, wash out wardrobe, launder clothes, reinstall with cedar balls etc. I just hate ironing