I have dealt with e trailer for a long time and they have been great. These people that complain would do so if their ice cream was too cold.
Get a life no one is perfect The only person I know that was perfect was crucified. Damaged goods are the responsibility of the carrier. Not e trailer. You need to wake up.
The deliver company damaged your order not the person your ordered it through.
My invoices have always been correct. If I have a question about what I am ordering they have always checked to make sure that the item is exactly what I am looking for.