Your friend is wrong, because I believe she confused "gift with purchase" with "sample." Sample means to try before you buy. A gift with purchase is exactly that. You asked, very politely, and with good reason, for samples to try, and they quite rationally accommodated that request, because the intention is for you to try the product(s) to see if you like them, with no firm expectation that you have to come back to purchase them. Certainly they hope you will, but you are not required. The fact that you have very sensitive skin and have to be extra careful means that there's going to be a bit (or a lot, depending) of trial and error before you find something that works for you. They certainly understand this - they are in the skin business, after all! Please don't worry - you've done nothing wrong; you are just performing your due diligence as a consumer. Believe me, they would much rather you try several samples before settling on a favored foundation than you buying and returning several different ones. I wish you happy shopping and great success finding the product that works for you!