Sightsavers — Amount deducted even after 12 months

Sightsavers representatives approached me for the cause and I agreed to pay for them but it was agreed only for 12 months. The representatives also assured that after 12 months the amount won’t get auto debited. But I came to know it was fake after the deduction continued. No one took responsibility and they dint even care as they were getting my money. Even if it’s for a good cause it should be done honestly.