On December 14/ 2021 I bought an ihome but only half of the screen began to be seen, but I don't have the invoice. It is possible to change it; the guarantee is 12 months. Thank you

Always take pics of your invoices with your phone camera. But yes u can recover ur invoices. As said above. Good luck!!

Yes

if you gave your number they can recover it. if you used a card they recover it, you'd need to bring that card into the store. if you know the date they can possibly recover it by sku, you'd need to know exactly which register you were at when you purchased if it was done in-store

You would have to go through apple and ask best but to recover your receipt with your credit/debit card or find the statement from you bank, if you paid cash then unlikely