The Amazon code for the Aukey Bluetooth 4.1 Wireless Stereo Sport Headphones doesn’t seem to be working. Any fixes?

The Amazon code for the Aukey Bluetooth 4.1 Wireless Stereo Sport Headphones doesn’t seem to be working. Any fixes?

For the Mixcder ZeroSport Wireless Bluetooth 4.1 Headphones, Lightweight Sweat Resistant the code isn’t working on Amazon. When adding it to my cart and entering the coupon code it says: The promotional code you entered cannot be applied to your purchase.

For the Mixcder ZeroSport Wireless Bluetooth 4.1 Headphones, Lightweight Sweat Resistant the code isn’t working on…