Disgusted

I have been servicing my BMW 320D since brand new at Ballito today on the final brake fluid service On enquiry of extension of my motor plan They say my car’s engine had been tuned Unbelievable I have purchased 2 M5 from them Why would they even stoop to such disgusting behavior unimaginable I will never ever deal with such dishonest people again my car is 5 yrs old with under 80k and had zero issues apart from service from day 1 This is way below the belt behavior