Hi, I made a coupon for 100% to test with Blesta 3.2, I went through to order hosting and got the the page where I'd selected the package.
Before: http://tbx.me/9izGZr.png
I then enter the coupon and click 'Redeem' to see this: http://tbx.me/uzO0m.png and http://tbx.me/r2o.png to show it's applied, but it seems to mess with the design a bit.