Rent-A-Center review: unethical behavior

I am writing a compliant because I rented from them several times with on time payments this year has been rough from me because I suffered heart failure so I was back in forward in the hospital. The threats started coming once I was late they would call me 5 or 6 times a day when I told them I will take care of it when I get out well when r u getting out. They still harassed me. They contacted my job several times and was told I was not allowed to receive a personal calls and to please do not call again. I only worked two days a week now and they know this but they started calling even on my days off. Today they called and argued with my supervisors when she told them again not to call her which they told her that they were going to continue to call because I gave them that number which was on my application. My boss called me up today and told me if they call again they will have to let me go. I am fed up they keep giving me the wrong figures so we are at odds on how much I still owe but they wont straighten it out. If I get fired behind this I am going to sue them.