Reliance Jewels — Diamond ring purchased has been fade within 15 days o[censored]sage

Address:	3C/301 sadbhavna block, avas vikas,buddhi vihar, Colony, Moradabad
Website:	Reliancejewels.net

I have purchased a diamond ring from reliance jewels, Moradabad store and diamonds in it got fade after use in 15 days only.
I have complaint twice previously and visit store multiple times for the same reason offcourse..They always clean my ring and give back to me which again seems like an oxidised silver ring after using it for a week.
Even for once, they have submitted my ring and forward it to company for further evaluation of diamonds but it doesn't comes to any conclusion either.
I want to change my wedding ring because it seems to be a silver oxidised one!
They stated that if I want to change it, making charges will be deducted but nevertheless I have paid the wholesome of money to purchase my dreamy wedding ring and it turned out to be fake!
Please considerate it further, i m complaining almost third time.
Seeking a valuable solution in near future.
Thank you.!