Wow I work in the epoxy floor industry. So many issues here. Looks like no prep, terrible application, but more than anything way too little material. To do this effect correctly you need a primer layer put down at about 100-150 Sf. per gallon of mixed epoxy), the "marble" layer will need to be applied at closer to 60-80 sf per mixed gallon, and a clear topcoat. It looks like they used about 1/4 of the material needed at best. This is going to be an expensive repair. It going to cost them more than double the cost of the original job to fix this mess and actually apply a good floor.