Surgical wound healed on the outside but fluid building up inside

Hello all! I had biopolymers removed from my buttocks about 4 months ago. My wound first got infected with EColi then with staph epidermidis. I was on a wound vac for almost a month. Then my PS took it off and did a debridement. Then a 2nd debridement. 4 weeks after the deb. He took dc'd the drains. 4 days after the removal of the drains my wound is full of fluid on the inside. I'm desperate I've been almost 4 months without working to make sure everything heals properly and its not

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