Hi,i was accidently make a purchased on pdf scanner

So i was downloading this app,pdf scanner,and then there is options there,strat free trial 3 days or maka a purchased,so i choose the free trial,somehow idont kno,i receive an email that i just make a purchased for this app,for 699thousands rupiah,rupiah is indonesia currency,anyone please help me how to fix it,i didn’t mean to make a purchased,but there is a “pending” word there..what is that mean?what if i just unsubs this?are they still make a billing on my cc?bcause i just receive an email that i just make a purchased for this app..please help me..in this circumstances i don’t want to make any billing,u kno ,it’s corona...my salary just being postponed just like football matches -_-