Taking into consideration the product you are currently using, it sounds like you are looking for a firm holding product that will give your curls a lot of definition. I am going to suggest a few products for you to try and then choose which one(s) you think would best suit your hair.

Biolage Gelee will give your hair firm control, body, and shine. It contains wonderful conditioning botanicals such as Hibiscus and Mallow. Use Gelee on wet hair, comb through to distribute evenly, then diffuse or air dry.
Amplify Spray Gel is a volumizing firm holding styler that will give your hair body and volume with lots of shine. Apply Amplify Spray Gel on wet hair then diffuse or air dry. You can also spray additional product for extra control and shine as your hair is drying.

Amplify Gel-Wax (a personal favorite) will give your curls the shine, control and frizz management of a wax and the gel will give your curls medium to firm control. Apply product to damp hair, comb through to distribute evenly, then diffuse or air dry. For additional control, use Amplify Spray Gel while drying. With the Amplify Gel-Wax, you have the best of both worlds.

If your hair is fine, try Big Trix, which is a boost-it mousse. Big Trix will give your hair shine, definition, and firm control, but the best of all it that this product builds incredible volume into your hair.

Your Matrix salon may be able to provide you with a sample of these products. Also, Matrix products purchased by a professional salon are guaranteed.