airbagit Sold me equipment with wrong specification for my vehicle mesa Arizona

Purchased air bag kit over phone to insure it recieve want I need for my car after installation (using very generic directions) air bags wouldn't pick front of my car up, Email the company there responce was THATS WIERD they suggest I increase air pressure from 120 to 140 and try them H ad purchase air pressure gauge for tank to get CORRECT pressure readings the system took total 150 psi to lift car notified them on pressure requirements they suggest I purchase an additional pressure switch rated at 180 psi (COMMERCIAL GRADE COMPRESSORS OPERATE AT 175 PSI) Iemailed them that I shouldn't have to spend more money on something that is sold to me for my specifacation also ask DO they even know if my system will handle that pressure THEY STOPPED COMMUNACATION  THATS WIERD is my response They should have sent me the switch and not try to sell me more equipment when they are at fault for not knowing there products capabilities