Mechanic Did No Work, Only Refunded Part

I booked Michanic to replace a serpentine belt. The mechanic arrived, stayed for about 10 minutes, and left without doing any work because he said the water pump was also broken. Despite no work being done on my car, Michanic is only refunding me for the part and not the service. This is unacceptable — I paid for a job that wasn’t carried out, and my car was left in the same condition. Customers deserve transparency and fair treatment, especially when no service is delivered.