MST Motors review: Bought car from mst motors

On 17 September 2021 I bought ford fiesta from MST motors month after I bought car the engine light came on I took to ford to see why the light came on I book the car in by ford I got report back from ford told me the fatalistic box in exhaust I went to MST motors they told me I need to bring car in I contact my insurance to tow car to MST motors the car was book in with MST motors they promise me they will solve the problem 3 weeks later light came on again took car back to MST motors fix the car light came on again mechanic came to my work told me it is the sensors I told the mechanic it is not the sensors ford told me it's the catalytic box in the exhaust MST motors told me I must bring car in I ask MST motors for second opinion on 17 December 2021 I took the car to the second opinion 3 days later the light came on again they told me the previous guys did not do what they suppose to do (they were the person to last work on car) I contact MST motors and told them the problem is back again MST motors told me I need to contact second opinion