Mswipe Technologies — Fraud Company / Threat

I had purchased m swipe machine around 4-5 years ago and paid rental and machine charges at the time of purchase but after 2 years of non usage I returned the machine and representative who picked up the machine said the security deposit will get refunded within few days but now I am getting call regarding rental due of around 8000 something and they started abusing on calls which is totally unacceptable so now I am filing legal complaint against company I have all the call recordings with me .