He then said to me 'that'll be £11.50 please". Thinking it was some vain attempt at humor I asked him if he was joking, to which he replied "no" and continued to fiddle with the cash register. I asked him what it was for, and he replied with "labor charge". Outraged, I said to him "you can go back into your workshop and loosen it or I can walk out your shop without paying" he then mumbled something about there being no point in him going back inside the workshop, so I left the store.
So you refused to pay a labour charge for getting your lockring tightened.
So you refused to pay a labour charge for getting your lockring tightened.
Nothing is free, get over it.