My eyes now look rounded and sunken in the corners and I have eye hollows. Any suggestions? (photos)

There is no substitute for a person to person consultation.  The value is that one does not have to guess what is bothering you.  Instead we have you point to the issue.  I agree, your eyelids are very skeletonized by your blepharoplasty.  Especially at the rim it makes the eyes look strange.  Generally it is best not to inject this groove.  Instead, by filling the subbrow tissue, the fold is reinflated and this helps hide the groove.  Less is more.  

Eyelid revision surgery requires a surgeon with significant expertise and patience. I do not see photos, just color blocks, so I cannot comment of your situation, but I have seen many patients with hollowed lower lids and rounded lids as a result of overly aggressive eyelid surgery.I urge to you stop  the under eye filler. Fat grafting can provide a much more natural and permanent result.Take a lot of time looking at photos and checking the credentials of any surgeon you are considering. Avoid anyone who suggests over-filling with fat and, when viewing photos, look for images taken 3 months, 6 months and 12 months after surgery as evidence of permanency. Most physicians will have many photos in their office that are not posted on their website, but an experienced fat grafting surgeon should have dozens of images online. If you are considering revision plastic surgery in the future, it will be very helpful to your new surgeon to have a copy of the operative report. You may elect to ask for your records now.

The risk/rewards of any other approach other than what you are doing now would not be worth it. A gradual, incremental filler program will be the safest and easiest answer for you.

Sounds like you are doing the correct thing slowly...................................................