Gold refund for artisan riding

So I am lvl 70 and I've recently purchased artisan riding for 5k gold, totally forgot of the reputation discounts which would have saved me no less than 1k gold (I don't even have an 80 alt to ride in Northrend at lvl 70). Is there any way I can get a full gold refund and unlearn the riding skill?

You guys come up with ways to surprise me every day . Lol keep it up.
Next thing maybe ask for a refound on a bag you've purchased 2 days ago because now its on AH for half price. Smh

hahaha.....