so I know they have antibacterial solution to clean, but what can I say its expensive. Currently we use water+soap solution but its not working well. I am looking to clean the inside of fridge/freezer.
Update from comments: I'm looking to mainly clean, mold around the rubbers of the fridge.
Best Answer
If this is a commercial institution, you are going to have to comply with your local codes. Many will require using a certified sanitizing solution, a diluted bleach solution, or similar after cleaning.
In particular in the US, I was unable to find any direct requirements in the USDA Model Food Code, and I don't recall any from 25 years ago when I received health inspector training in one jurisdiction. That doesn't mean there are not such requirements in any given location, even if in the US.
Assuming your location permits, normally you would clean the refrigerator with a mild solution of dish soap, as you have been doing. With thick gloves, very hot water will help make the cleaning more effective. Floors, walls, and so on in a walk in would be cleaned with a solution of your general purpose detergent (back when I was in commercial service, we actually used unscented Tide, which is a very effective cleaner).
If it is possible to empty the refrigerator and turn it off for cleaning (which is not always practical in commercial environments), this doing a thorough job, and makes it easier to clean with hot water.
Update regarding moldy gaskets:
Per JES Restaurant Equipment (emphasis added):
In addition to being unsightly, mold on your refrigerator is almost certainly a code violation that could have drastic consequences.
Your gaskets are also probably fully replaceable, but since you are concerned with cost, this may not be your preferred option. Still, if you can, temporarily removing the gasket may facilitate cleaning it thoroughly.