Hi There

Looking for advice.
I recently purchased a 2013 plate diesel mazda 6 and had to return it to the dealer to be repaired due to excessive smoke from the exhaust. There was no warning lights on. I have now picked up car, supposedly fixed, but there is still excessive smoke. When I phoned the dealer to complain, I was told that they had done everything they could, replaced the DPF, EGR, Twin turbos and sensors, a lot of work, and it should settle down and work fine. They said they tested it and they were happy it was fixed. Had car back for 4 days now and still smoky. Any advice would be great

Thank you

Ralph