DO NOT BUY A NISSAN CAR!!!!!!

We bought a BRAND NEW 2017 Nissan Qashqai 1.5DCI Acenta in December 2017. The STUPID CAR keeps going in to Limp mode, and shows an engine light because the DPF filter is not "clean". Suddenly the car goes into Limp mode and you cannot drive more than 40km p/h. HOW IS THIS POSSIBLE NISSAN? I bought a NEW VEHICHLE??? we have been to the NISSAN dealerships 4 times in the las 5 TIMES, I want a new car or I am going to the press. CONTACT ME WITH A SOLUTION OR I WILL STOP PAYMENT MY MONTHLY INSTALLMENTS!!!