NHTSA Complaint #11587479 — 2017 FORD ESCAPE

My check engine light on causing vehicle to run rough.and delay in engine performance.(transmission shifting). Ford dealer replace several Emission parts. (Warranty.) .Purge valve system. Oxygen sensors Etc. Car in shop for 12days.pick vehicle up drove 2miles check light came on again. Back to ford, Now ford wants Me to pay for needed repairs to charcoal canister, Purge Valve system. $400,00 to $ 800.00. This repair is EPA and Federal Emission Policy. Which Fotd and Dealer States no it's not. Dealer will not HELP with any assistance. Tried to explained Ford and Federal.EPA rules. Per Ford Warranty Parts statements and policy . Dealer 1st stated to me this part is under extended Ford Warranty. Hours later called Me back,Stating It's My responsibility to repair. This part is Electric vacuum operated. Prt# GV6Z9D333A Purge Control Valve (Block off switching Valve ) Which is a Hose and Solenoid Assy. The say it's a hose nothing else. I explained a hose is only a HOSE and has nothing to do with opening and closing of Emission Purge Valve .System. That is what the Solenoid is for which opens and closes Purge System from fuel tank Vapors system to charcoal canister. Please Help me in this repair clarification.