Option Care Health review: Company keeps harrassing about a lost pump

Option Care Health wants me to pay 2500.00 for a lost pump. I do not ever seen or had the pump they are talking about. I was in the hospital in May for cancer but they never used any kind of pump for treatment. I want them to quit harrassing me about it. I have told them numerous times that iI have never seen their pump. The date was May 10 2022. The name of the pump is Curlin 6000 CMS sn3 - E0781