Not working – Kids Games! Learning 4 Toddler Review

Looks super cute, but there is no sound and despite paying for the full access, only a couple will open and they have no sound either . Our sound works on our other apps - it’s just this that won’t work. Also, the links to the developers are not opening, so if you’re checking this, please help or refund our purchase - this is way too expensive to not have my kids play on it one friggin time
Review by refund me or fix please on Kids Games! Learning 4 Toddler.