Poor workmanship

I bought a ring at NWJ Hemingsways Mall (East London) and had it sized at NWJ Cape Gate. I was promised that the ring will be sized for free based on the price and that I could re-size it in Cape Town. I took the ring to NWJ Cape Gate and was charged R180, which I paid. Upon collection of the ring I noticed that the ring had scratches and was not completely round as compared to when originally purchased. The ring was thinned out at the bottom and is slightly joined skew. I'm really disgusted with this type of workmanship, considering the amount I paid for the ring. After all... my payment was not skew, bent or twisted but straight.