Kitchen aid won’t turn off

Hi everyone! I recently bought a white classic stand mixer 4.5qt. It was working fine until today, I try to turn it off but the mixer keeps going, I had to unplug it. I recently bought it (as in less than a month). I’m not sure if I should contact kitchen aid directly to see what they recommend or if I should just do a store return/exchange (I bought it at Target). Anyone have this happen ? Thank you!