Bad Quality Products

I bought a infinity ring from American Swiss last year and got it resized, unfortunately while moving I lost the slip, two weeks ago the ring started pulling apart where they resized it and I took it back to get a quote to fix the problem they created in the first place, now they quote me R747 to fix something they couldn't do properly from the start, it's almost the price of a new flipen ring, this is unacceptable you can't sell us bad quality and still expect us to pay to fix it.