I've been trying to get a good quote from (my mech mobile mech. Co. All I need is brea...

I've been trying to get a good quote from (my mech mobile mech. Co. All I need is break dwn on parts each and labor cost. The parts cost is way out of line even if I get charge full retail at auto parts store I'm significantly cheaper but they also added for parts I didn't request are on quote I don't need them. I can't get there app contact info to transfer call to a actual co. Customer service management can't get a contact no. For co. Customer service rep supervisor in the company not there booking appt. Staff from app. How can I get there main office customer service phone number.want to get quote from corporate customer service work want done is * ignition coils (BOSCH) . *upstrm and *dwn strm oxygen sensors* (BOSCH) . SET WIRES (**) DENSO. SPARK PLUGS (**) BOSCH. *NEED LABOR COST AND PARTS COST AT REASONABLE MARK UP NOT WHAT THERE TRYING TO CHARGE NOW GETTING PARTS FROM AUTO ZONE FOR THIS WORK IS ONLY ***.** NOW INCLUDE MILITARY DISCOUNT. AT **% MAKES PARTS COST AT ***.** NOT ****.** FROM MY MECHANIC COST BREAKDOWN. WHAT CAN I DO?