Breast Implant Revision - Uneven and dent in cleavage near sternum - can this be fixed? (Photos)

I had a breast revision 8 months ago. I had my implants replaced due to capsular contracture. My old implants were small 160CCs & they were above the muscle. The new implants were put under the muscle and are soft touch gummies. Right side was put in at 240 & left at 275. About a month ago I noticed a dent on my left implant near my cleavage & sternum. It must have happened recently. I would love some feedback on what is going on & what caused this? What type of revision is needed to fix this? Second item is that my breasts are definitely not even. The left is very obviously bigger. I would say about 1/2 cup. It is very obvious to me. Could the left breast be having issues because it is bigger & doesn’t fit my frame? Also, any feedback on how this could happen? Is 35cc’s a big difference? I’m just very upset with my results & not sure what I’m dealing with here. The size difference alone, maybe I could live with, but definitely not the dent. Also, is the doctor at fault here for any of these issues? I certainly don’t understand how they are different sizes. Any feedback would be appreciated!