Would 400 not fit? What are my options if I want bigger boobs? (Photos)

Hi! I had my breast implant revision surgery because I had a waterfall deformity. My previous implants were under det muscle and 250cc moderate round profile. I also really wanted to go bigger, at least 2 cup sizes. I showed my surgeon wish photos and he recommended 400cc which I was happy with. But before surgery he told me that he would use either 360 or 400 depending on if he thought it would fit or not during surgery. He ended up choosing 360cc (high profile). I was a bit upset when I woke up cause they were barely any bigger. He said that the bigger ones didn’t fit and that I would have to do a fat graft if I wanted bigger, and that I currently didn’t have enough fat on my body to do that. And as my boobs healed, the smaller they got. I now fit the same bras as before surgery, only looking fuller. I love how the look, but still sad that I didn’t get the size I wanted. What do you think about his descision? Would 400 not fit? What are my options if I want bigger boobs? Thank you for reading :)