Dishonest Service Manager &, Don't care DP

I took my Honda CRV 2.2 in for a service and new wiper blades. When I booked in my vehicle I requested Nicolene to ask mechanic to CHECK as I been getting a warning light 2/3 times (DPF) and then it goes of. She phoned later telling the warning light not on if it happens again I should bring it in. Later I got a call telling me the light is on and now they cannot get it off. When I arrived there my car was put on computer system revving. Then the hell started as service manager Angeline Lingenfelder started with her dishonesty telling its our fault. She wanted car to get more detail from Honda SA. Everytime my husband confronted her she gave us more run around. Her dealer principles was not willing to speak to us and we insisted and walk into his office. He had such stinking attitude and is not worth is title. I totally lost it. My Honda CRV will never be the same due to *********** staff who doesn't listen to the customer's. My car was modified on there instruction. She even wanted us to sign documents to say we required it... Which was again dishonest. She even alter the signed in document and the paper I gave when I booked it in.