EML o2 sensor

[Notnots]

Hi all I have a 2015 a3 1.6 tdi with a problem and I’m going insane ! If I floor it I will get a EML for o2 sensor bank 1 sensor 2 ( garage has replaced bank 1 sensor 1 and 2 ) yet I still have this problem 😢 take it back and I’m told dpf is blocked so I pay to have it cleaned low and behold still have the same problem. It dose not go into limp mode and power is not restricted so I take it back and he said turbo is leaking. Has anyone had this or similar problem ? I’m fed up being taken for a ride. The car is high mileage (148000) but is well looked after. full service history and if things need doing they get done. Anyway thanks all