Realm Is Utterly Useles

I have recently Purchased A realm through one of my worlds the world is about 140 MB and i pressed play on realm but when i loaded the realm i had just bought it was a randomly generated world so i tried replacing the realm but it said an error had occurred so i tried closing the realm and there was another error then i made a copy of the world and tried again Nothing i have searched this up online but nothing helped i would really not like to waste my money so please help