Regarding credits

hi, so, i just found about the app Yesterday, around 6:30 AM, it's currently 11:26 AM of next day, i'm on daily credits cause i can't efford other type of membership, it says the credits woll go back on the next hourly update, but it hasen't yet, how does this exactly work?, so i know how much longer i will have to wait, if you could answer, , PLEASE thank you