stubborn pibble!!!!

My pibble is such a shit disturber! We have a pitbull (5 months old) and a golden retriever (2 years old) they are constantly peeing and popping on my floor. The my golden retriever just started when we got her he was fully potty trained. And she is really hard to potty train we let her outside all the time just last night I let her out she immediately wanted in and pooped on the floor any tips for potty training?? And she is 5 months and doesn't even know how to sit no matter how hard we try she is playing dumb I swear!! . My golden retriever is such a fast learner we never had any issues I could really use advice on training.