Brown Jewelers sells bad quality products and bad after sale service

Bought a chain with pendant without fitting it. When I tried it on at home, it was way to short - the length will fit a small child's neck. We took it back and paid an extra few R1000 to make it longer. When I tried it on at home it broke. When I took it back they now insist that the chain is broken due to that it got hooked on something???? I can not understand this - I have worn a chain from a different supplier for more that 10 years and it did not "hooked" on anything for 10 years - What is wrong with their chain that it gets hooked on something and breaks on exactly the same place were they extended the chain???? BAD QUALITY AND VERY BAD AFTER SAKE SERVICE! Now I must pay R700 for them to repair their in verier quality chain.