At My New Optical Store, My New Prescription Sunglasses Give

At my new optical store, My new prescription sunglasses give me headache and fishbowl effect. At former optical store, the other glasses with same prescription doesn't. they checked prescription and distance of pupils and they said it's right. They say the sunglasses are not tilted as much as the other one but the way they compared glasses didn't make sense. what should I do?