My partner had purchased goldmember ship and everything was good for 3 days and then when my partner attempted to buy gold membership again it shows purchase was successful and it showed that he got his gold coins and his parent points but then when he went into buy something from the store those extra coins disappeared on him too and it shows that he has to buy the Gold member ship again

This game is a thief I have attempted to buy the gold member five times now every time it starts off showing me that I get the extra gold coins but then when I go back into the store to make a purchase before I can even make the purchase the coins that it gave me disappeared