estaban estafando
-they/you were defrauding
Imperfecto progresivo para el sujetoellos/ellas/ustedesdel verboestafar.

estafar

Les explicó que los estaban estafando en los precios y en el peso que pagaban en la tienda por los productos que compraban.
He also showed them that they were being cheated in both prices and weights for the products they bought in the stores.
Palabra del día
amasar