[dpf issues]

hey guys having issues with my 2.2 dtec accord. i bought car from a garage in southampton and had it delivered to me in gloucestershire, car seemed ok but a bit down on power anyway a week after i got it on a friday dpf light come up and went into limp mode. took car to honda dealer and had force regen went much better after that. 2 weeks later on a friday wtf dpf light comes on again, getting a bit pissed off with car already now lol. my mechanic got his mate who is a proffesional dpf cleaner to come and clean dpf, great sorted he said dpf is totally clean nice one. a few weeks later ffs dpf light again comes up and bloody limp mode, am really sick of this car now and garage i bought car from ignores all calls and emails even though all cars bought from garages must have 3 month warranty! anyway take it back to my mates garage hooks up code reader and zero error codes only issue they finally found was exhaust temp sensor reading very low, so replaced that and its been happy days until now another bloody friday and guess what dpf warning light and limp mode wtf. is their anything else that could cause this cause im totally fed up with this car now and im self employed and its my only vehicle and i need it for work. any ideas would be much appreciated as cant take much more before i just take car to the scrap yard. HELP

[Flat power at low revs]

Hi guys I've got an 07 accord tourer cdti, I'm finding its gone very flat on power and power don't kick in till 2500 rpm. I can hear turbo whistle especially when car cold. Any ideas?