im confused

I'd make it 900 with 3 limpers, but either way he had his mind set on limp shoving for some reason. I'd probably call as I don't think you'd be up against aces or kings. At worst AK or Ace X whick you'd be flipping which him anyway. But you are only in for 750 which leaves you with around 7.5K so you could make the fold as you are commiting your whole stack with queens pre.

What happened in the end?

Final table in a £5 unlimited rebuy tourney

5 handed
Blinds are 2000-4000
Folded round to me on the cut off and I have 
I make it 10,000
Button flat calls
SB flat calls

Flop comes 
SB Checks
I move all-in for around 45K
Button calls for around 40K and turns over 
SB Folds

Did I make the right move here?
I hit my diamond on the river and he fella was complaining that I made a bad move and kicked up a fuss about it