I am so angry! I was charged 3x for Boost!

I can't be bothered to type it out again so just read what I wrote in the refund appeal after it was initially refused:

'I purchased the Boost feature and received a notification saying there was an error.

Immediately after I purchased it a second time assuming it didn’t charge me already (as the features had not unlocked), but the same error message occurred once again.

It was only the third attempt at the purchase in which it finally worked, and the premium features were subsequently available.

The premium features only last for one hour. The app does not allow you to purchase another ‘Boost’ without waiting for the hour to end. So, three purchases of ‘Boost’ minutes apart is not possible and a fault on Apple/Grindr's part."

The invoices show all three purchases occurred ONE minute apart. I don't know how to make it more clear to them. But they said their decision is final.

Is there anything I can do? Is it worth emailing Grindr since they themselves can't refund me?

Honestly, I would be more inclined to let it slide but the disrespect the app has had for its users with its changes over the last few years makes me not want them to get away with it.

Any advice highly appreciated!