My PC

My PC is kind of repaired.
I am afraid, the computer shop I asked to repaire might took my RAM Memory because it is now half of what it is supposed to be.
I know RAM Memory is expensive but mine is not so big and not valuable.
I hope it is my misunderstanding.
Maybe I can go to the shop and ask the explanation to it. Again, I hope it is my misunderstanding. Or I should just avoide the communication and left them becasue they are hopeless if they really took.
it might be the time to buy a new PC. I should not have tried to repaired it.