You might like to take a break for few days from Wiz7, or even try out another game in the meantime to get some diversion, and return to it later. It can become a bit boring after a while, playing with the same game for a long time, and games should be played for fun after all
You can also buy the credit cards from Dame Ke-Li if you manage to get through to her in this labyrinth of invisible walls. Together with some very useful ankhs, if you have enough money, or a character with lots of points in Legerdemain skill to steal them.