Secrets Shhh

My husband purchased my engagement ring from Shh Secrets. Initially I loved it but now I'm embarrassed to wear it as the stone has gone cloudy and it looks horrible now. Also my husband purchased hoop earrings with diamonds but the earrings have turned black. If that is not enough the gold bracelet with diamonds now has a missing stone just as the blue stone drop earrings is also missing a stone. Everything that my husband has purchased from this store has been faulty. I will be taking the jewellery to the Carindale store this week so we will see if anything can be done to resolve the issues.