Worse Service ever

Beame is the worst Tracking device company ever, i have signed a whole 3 years contract with them and paid for the service in full in advance. In that 3 years they only communicated with me the day they installed the device. No testing of the device in that 3 years, let alone after sale service or any form of communication whatsoever in that 3 years. Then on the last week of the contract they phoned for an extension of the contract which i made it clear that i don't want anything to do with them once the initial contract expires. I requested that they cancel the contract with immediate effect on the last day. I also send an email to that effect, the contract expires on 30 June 2019.

All of a Sudden i receive an SMS on the 20 July 2020 which says my account is 60 OVERDUE and threatened me with Legal action. I mean what nonsense is that? I never had account with them for that matter i paid for the whole 3 years in advance, subsequently cancelled the contract when it came to an END. BIG Question is, ''Why did it take them the whole year to notice i owe them, if indeed i do?"