I ended up calling customer support and they added it on their end. At least they did it this time. One time I went to get an oil change at Valvoline. They ask

I ended up calling customer support and they added it on their end. At least they did it this time. One time I went to get an oil change at Valvoline. They asked for my email and I reluctantly gave a +valvoline email address and the manager straight up would not type that into the computer. Dude thought I was up to some major shenanigans.