85,000 dinars for three interventions and my car s...

85,000 dinars for three interventions and my car spent 35 days in service. A couple of days ago, a car mechanic told me that they didn't pay me 12,500 dinars for the suction head and they didn't install a new one. They didn't know how to fix my car, the same mechanic sent me to a car electrician who replaced my cable from the computer to the gas butterfly and solved a problem of 6000 dinars and not 85000 and they didn't fix anything. I'm disappointed..