[mothered]

do not do asos, they do not repay

They do have a support team, that handles missing Items on receipt of delivery.

If your SE Is calculated and executed effectively, It will succeed.

Is it necessary to replace the item with the same weight? Do I need to change the label (putting the label of the SE'ed part on the article that Im sending back) to confuse them?

It depends on the method you're planning to use, which Is based on the nature of the Item.

What Item do you wish to SE, Inclusive of Its weight and dimensions?