I was informed my laptop's faulty keyboard will be...

I was informed my laptop's faulty keyboard will be checked for internal corrosion and will be replaced if required. The next day I found out that the keyboard is replaced with a different type having no back-light, without informing me. When I complained, the reply was that that was the only matching keyboard they had. Moreover, they never didn't try to remove any corrosion from the original keyboard although just a day before I was informed that they will try doing that to see if it works.

I think the guy has knowledge and skill but lacks professionalism.