3 Year Oneplan nightmare

Oneplan handed me over to 3 different debt collectors for an amount they claim I owed, despite the fact I sent in proof I owed nothing , I was threatened, harassed, and told a judgement would be put on my salary. After non stop harassment, sms's and phone calls for 3 years and 8 months they finally closed the case as they discovered they made a mistake. In fact, they owe me money. I will probable never receive an apology for all of the harassment and I will probably never receive the money they owe me. Typical