Help! My mom got a JCPENNY CARD IN MY NAME AND LET IT GO DELINQUENT?

Help! My mom got a JCPENNY CARD IN MY NAME AND LET IT GO DELINQUENT I MOVED OUT WHEN I WAS 18 FOR COLLEGE, I MOVED BACK IN RECENTLY AFTER REALIZING MY CREDIT IS NOT GOOD ENOUGH TO TRANSITION FROM A APT TO A HOUSE. BEING THERE A WEEK I RECEIVED A CREDITOR LETTER IN THE MAIL SAYING I OWED 1,200.00 FOR A DELINQUENCY WITH JCP. I CALLED THE COMPANY AND WAS LIKE YOU HAVE A MISTAKE IM A VICTIM OF IDENTITY THEFT. THEY BASICALLY LET ME GIVE MY SPILL AND THEN WAS LIKE OK CAN YOU MAKE A PAYMENT TODAY WHICH DIDNT HELP AT ALL. I THEN ASKED MY FAMILY ABOUT IT AND MY MOM TURNS OUT TO BE THE ONE MESSING UP MY CREDIT. SHE TELLS ME, SHES NOT GOING TO PAY FOR IT BASICALLY. IM NOT SURE WHAT TO DO BECAUSE I KNOW MY MOM HAS DONE ALOT FOR ME BUT I WANT TO HAVE A HOME FOR MY OWN.