Most stores keep a record of all transactions done. Esp if it's under 30 days. Go back to the store you bought it from and ask them to reprint your recipe.

Why didn’t you return it after you figured it out it was defective?! If you don’t want your mom cleaning your place then you need to say something. Besides she is too old to be picking up after you. You brought this on yourself.

Time to change your locks? It’s a sweet gesture, but that can get annoying

Leave a bunch of kinky sex toys and **** scattered around the house. She'll never bother you again.

My mother loves to move my things without telling me now my wife does it so I feel your pain

What kind of backward country do you live in if your warranty is void because you threw out the packaging?

If it is defective and not fit for purpose then you should be able to return it without the box. Check your consumer rights.

You’re legally covered anyway by Australian consumer law, if the item is faulty they must take it and either give you a refund, exchange or credit. Doesn’t matter if you have the box or not.

Tell her about all the money her intrusion cost you, ideally while crying so she feels really guilty. Then discuss boundaries which you should have done ages ago (Nobody should be in your home behind your back like that, it's weird). Then tell her that since she's such a snoopy, privacy-violating person you can't trust her to even give back her key without copying it so you're changing the locks. Be sure she knows that this means she's cost you $X more. Maybe she's not too old to learn to be a decent person.

and this is why I don't give relatives keys to my home