I see, pretty rum of them to dismiss your grievance.
A box of carpet tacks strewn across their forecourt may bring short term relief for you.
I had some slow punctures fixed myself a while back, the next morning one was flat as a pancake, (only on the bottom thankfully
), anyhoo back in to them and he took the stance, maybe rightly so, that I'd driven 50 odd miles in the intervening period, hmmm, I was getting grumpy by this point but give them their due, they whipped the tyre off to reveal, ta da da, a big feckin screw in the middle of the tread,
er, can you repair that for me please, I asked..
Certainly Sir, which brand of humble pie are you paying with today?