I want a refund

I payed for 5000 coins it was $29, I did this so I could make brain teaser videos, I’ve tried to make a couple of videos and when I try to generate the questions they just delete and it takes me to a page and it says it can’t load, how can I go about getting a full refund, this app is terrible, it’s taken nearly 1000 coins from me and I haven’t even made one video, this is day light robbery, I want a refund ?????