Mini F56 brake pad wear

[JRdrums]

My wife has a 65 plate Cooper with 27k on the clock. At 14k miles the rear brake pads were declared warn by the on board computer. I had them replaced and questioned the wear rate. I was told the new pads would last longer. At 25k the front pads were also flagged up. When dropping in the car I was told usually the discs need replacing when the front pads are warn. I questioned this and no more was said and the discs were left alone. Now at 28k the rear pads apparently need replacing again. I’ve checked them and the pads have lots of meat on them, around 6mm. This is clearly a scam as the computer looks to be set to 14k miles from the rears and around 25 for the fronts.
The car is due it’s 2nd service in 1000 miles plus it’s MOT. What’s the betting that the brakes pads pass the MOT without even an advisory.
What can I do as the ‘drive carefully check braking system ‘ warning is annoying?

[JRdrums]

Had the pads changed and computer reset by my local garage for £120 today. MOT passed so all good much cheaper than BMW who would have recommended new discs.