Celestion T5970 Pulse 15" 400-Watt Replacement Bass Speaker - 8 Ohm 2010s Black

Brand New speakers.
I bought these for a speaker cab that I made. I purchased them from a shop on Reverb back in late August of 2025.
I bought the wrong impedance speakers, so I ended up not using these.
I've got 2 and they are $110 each. You'll pay way more than that - plus tax in a shop.
Please help me recoup money from my mistake.
Specs:
15"drivers
8 ohms each (you can wire this pair for 16 or 4 ohms)
400 watts each