Zeno Zoldyck

I was buying prayer potions form the head chef using "Buy X" and my keyboard went crazy causing me to end up buying 761 potions instead of the 50 I was looking to buy. I know this still falls under user error even if it was a computer mess up. I'm asking to see if there is a way to maybe revert or refund/return the purchase. Selling to the general store at 7,400 loss is brutal. Please let me know if there is anything hope for me - thank you.