advanced auto sales got a car from them trying make payment they trying repo it instead winfield, Missouri

i am buying a car from advanced auto sales..i got behind on payments yes but i have been trying to make payment or pay it off.but instead of them letting me they are trying to repo it..i have it almost paid off.i called many times they will
not return my calls,instead they are going around harassing my family and my family neighbors who does not even know me..they are giving these people personal information about me..they have been calling my daughters school..but will not
talk to me..my ex husband was supose to be making payment i thought he was until i got a call from my sister.they always had my phone number but never called they told my daughter if were putting a warrant for me and a judgement. my daughter ask them if she could bring them the money for the car they told her no..the car is in my name and also my husbands name but they are only putting the warrant out for me not him.and i don't understand how they can this is not right.i think they want to resale the car and make more money off of it is what it seems..this people are not right..i seen they keep getting the same cars back on their lot now i understand why...thank you