Rain simcard

I just received a call from Rain attorneys that I'm owing them thousands , yes i app**** for rain simmcard i received it but there was no coverage in my area i tied to use on my one phone to hot spot it didn't work i bought a router i called them they say they will cancel it it was around 2019 or 2020 I'm not owing Rain anything here is my identity number this was in period of three day then i ignored it as they said they cancelled the sim , i so disappointed in them coz they can check the calls with my identity number