Malabar Gold & Diamonds — No return of money for ruby ring purchased

We have purchased ruby ring in 2017 also got certificate of it . During purchase person told that we get full cost of ruby on exchange if we have card . Now when we went to exchange the item they say that we dont take birth stones as exchange . While purchasing the item we didn't ask for birth stone they forced us that it's very good investment only stone cost was 18k without ring and betrayed us . Malabar as Rao Nagar Telangana hyderabad has very bad service no person is educated and no manners how to talk with customers very rude behaviour all false assumptions are given . Very bad service after we have shown our payslips of our previous purchases also there is no proper response . The persons in store much have knowlege before they sell and has to communicate everything truthfully . While purchase they say 1000s of things on exchange they change their words . extremely disappointed .