Tummy tuck needs revision. But not for why I thought, who is at fault? Who should pay? Can this be fixed? (Photo)

I have an uneven tummy tuck with a pucker on the left that has been there since I took off the bandages. I’m at a loss as to what to expect. Dr says I have some extra skin on the tummy starting to over hang, so needs revision. Is this anyone’s fault? It definitely seems that the unevenness and pucker are his fault, can this be fixed? And I though TT scars were under your underwear line? Mine is VERY high, is it because my mons pubis also got a lift?