Walmart review: Eyeglasses place

I got my glasses and they suck... I can see long distances and up close but when I am at work I can not see my register.. When I am at home I cant see my pc or do bills on my table or anything. I went in to complain.. The rudest people there and apparently dont know how to do their job.. I got bifocals. Thats fine but its a very small piece on my glasses.. Half the time my vision is blurry.. Im sorry but if you go in to get glasses and a eye exam isnt the glasses suppose to work no matter where you look.. I am a diabetic and have vertigo.. But this is ridiculous.. I cant afford another eye exam or new glasses at the moment.. This makes me so mad how people can take advantage of someone and sleep at night