Hardbroken and feeling used

bought venue 2021 last year brought it in for a service but instead they asked me to trade it in i took the the Nissen Mcnite Automatic and had problems ever since took to Dekra find out there was repairs on the vehicle and it had three different coulors now they don’t want refund me or give me another car they just want more money and I don’t even have the car 6 months and what makes it so hard it because it’s not the first tim.