freezer method wont work with these. They can hibernate for a bloody long time and I think only anything under -10 degrees will kill them, even then it's debateable and I think they need exposure to it for a month?
I posted my experiences with these in another thread.
If you have clothes, then wash them at 90 degrees a few times, and it should kill them off. Do it twice to make sure. If your clothes are really precious then the lowest you should do is 60 degrees, but tbh, the hotter the better.
If you get ANY eggs or bugs in your house they'll grow in numbers over a few months and are a pain in the **** to get rid of. That's why I have 13 bags of clothes and soft furnshings stored outside at present, a new bed, and the furniture with insecticide residue all over the place.
Pest Control for me was £200, luckily refunded, and LL bought a new bed, or that cost would have been double. Unless you are REALLY attached to your clothes, I would bin them instantly.