get the floor made higher under it. either half brick cement and re tile it. then get a fllushing cover made from same stuff as kitchen bench.

Ring the company and ask for the covers for the dishwasher if they make them


or just make some new legs if those ones completely screw out go get some bolt to the same thread make them longer put some rubber feet on them and then get a flushing made still so u dont see bottom of dish washer and stuff doesn't go underneath it. This is the easiest way i think.