I'm at a loss... I don't know what is going to happen I called my job and told them I will not be…

I'm at a loss... I don't know what is going to happen I called my job and told them I will not be returning and guess what? I'm fucked!!! (Excuse my language ladies!!!) she told me I owe them... money!!! I did not get paid maternity leave... which I was fine with... with that being said I took 12 weeks I'm on the 10th week... what they paid me was vacation time and sick time... so either I pay them back or I go back to work and work til I paid them off... btw I didn't want them to pay out my vacation I told them I didn't want it but they responded "that I have to" so now I'm screwed!!! Has anyone had this happen? Ohhh and I work at a family clinic that's has over 13 clinics in my area