Can I return my Lancome foundation brush?

I few days ago I bought a Lancome foundation brush and received a gift with my purchase. Today I found a foundation brush from a different brand that I like better. I have not used the brush yet so can I return it? Do I have to give the gift I received back with it?|||Yes you can return it, and I don't think you have to return the gift. I had to return something, but I didn't take the gift back, and they didn't ask for it.