I had them in my carpets. Luckily they didn't spread to anything else like throws or clothes. But they did spread to carpets in three different rooms and the numbers exploded over a short period of time.
Don't mess around or you'll regret it. Absolutely get the harsh chemicals and spray around the edges of all the carpets. Hoover mattresses. Move all furniture and hoover underneath. Chuck the hoover bags in the outside bin and clean the filters/inside of the hoover.
Empty the contents of the wardrobe into bin bags. Chuck any clothes that are unlikely to be worn again in the outside bin. Wrap clothes you want to keep and put them in a chest freezer if you have one, or normal freezer if they fit. If they're not delicate, put them on a 60 degree or hotter wash. If you have a clothes steamer, hot steam them- useful for delicates.
Any sign of infestation in an item- chuck it in the outside bin
Hoover the inside of the wardrobe, paying special attention to nooks and crannies. Put the hoover bag in the outside bin. Spray the inside of the wardrobe and let it air. Buy the chemical hangers on a quarterly cycle to keep them away in future- you can get sachets for the drawers and ottoman.
Check clothes stored elsewhere and bedding carefully for any signs of infestation.
In future consider bagging any fur/feather/wool clothing whilst stored.
Check online for other advice. I may sound harsh, but you really have to be ruthless or you'll never be rid of them.