Should I see Bellafill results immediately as I've heard, or after months like my injector tells me?

I thought Bellafill provides immediate, visible correction after injection which is maintained and improves as the person's own collagen grows around the microspheres, whereas Sculptura shows improvement over time after a series of injections. I had Bellafill done and after the initial swelling resolved 4 days later, it looked like I had nothing done to my face. My injector tells me I have to wait months to see any results. I was expecting to see at least some difference immediately. ?