Malabar Gold & Diamonds — exorbitant charging of making charges thereby looting the customers

Today i bought small ear rings weighing 1.150 gm from malabar gold outlet at phoenix mall pune for gifting to a kid of one month old. The branch charged 21 percentage as making charges initially but reduced to 19 percentage later stating as introduction offer. This is blatant violation of rules regarding making charges and i am contemplating legal action on this. Customers are advised to be more vigilant while transacting with this brand..