Problems with iPhone home button?

So at the weekend I got my phone screen fixed (phone cracked and I managed to get it fixed the same day), but now I'm having problems with my home button, just imagine it's due to something being knocked when they were repairing the phone due to it being absolutely fine beforehand. But anyway, I looked at it and thought it looked a bit wonky, so I looked and pressed it (lose) and to my surprise it rotated with my fingers, it also seems to not be as responsive when I press it.

Is there a reason for this? And is there a way I can fix it relatively cheaply?

If it wasn't an apple tech who fixed the screen on your phone then you won't be able to take it to an apple store and have it fixed. With anything apple you should always have apple fix it because that way you don't have to pay for it if they make a mistake.

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