Zwei ahnungslose Engel (1969)

They live among doilies and all kinds of bric-a-brac, the two prissy old ladies Carter, and try to make the best of their pensioner's existence. For example, in a shopping game where they keep a whole army of sales clerks in suspense, only to end up buying nothing. A computer error provides the two with membership cards for the international service club, enabling them to make cashless payments. They end up with multi-digit dollar debts and a turbulent court case.