Rain using Debt collectors without researching a case.

I previously rated Rain because I was harassed by them because I wanted to end my contract because the suddenly illness and ultimate death of my daughter which found me ****m away fom home and my Rain wifi for about a year they observed that I was not using any data. I had endless problems contacting them and eventually I got hold of them via Google maps and spoke to one of their management team and she assured me that she would credit me with the last month's payment. She also informed me that I should hand back the Router which was I did after again communication problem. Recently I received a sms from NuDebt debt collectors stating that my case was handed over to them and the requested me to pay back the money which I was exonerated from. Please go back on the previous reviews and see the communication I had with Rain and their replies.