3-month iRacing voucher + CSL Elite WRC wheel

I'm looking to buy the CSL Elite WRC wheel and CSL Elite PS4 base, and the website fails to see that I have a valid steering wheel in my cart to qualify for the 3-month iRacing voucher. I've tried adding the CSL Elite PS4 base and WRC wheel separately, and the bundle. Both will not work with the iRacing voucher. I emailed support 2 days ago and still no reply...

The product 'iRacing voucher - 3 month subscription' can ONLY be purchased in combination with a Steering Wheel. Please add a Steering Wheel, Racing Wheel or a Bundle which contains a Steering Wheel to your shopping cart or remove 'iRacing voucher - 3 month subscription' from your basket.