[mothered]

I haven't proceeded with the replacement as I did not want to pay for the shipping.

You can double dip by complying with their request and pay the shipping, receive the product, and then advise them (again) that the product Is not working. You vent your frustration In a calm yet adamant manner and request a refund. As such, they've just refunded your shipping payment.

Also, In the original email of your screenshot, they've requested "I'd be happy to send a replacement If you take a screen clipping of your order". How did you handle that?