You swapped them
You exchanged them
I want the chance to chat about this
I would like the opportunity to discuss this
Call us
Please contact us
I got another pair
I received another pair
something causing shame or dishonor
disgrace
I’m so angry
I am very disappointed
they didn’t work
they did not work
We’re sorry about the problem
We apologise for the problem
I got some headphones
I bought some headphones
I sent them back
I returned them to you
I want all my money back
I would be grateful if you could send me a full refund
if you need more information
if you require further information