Tata Docomo — legal notice being sent 7 years after broadband connection was ended

My father had taken a tata docomo broadband connection in the year 2009 when we were living in nagpur. My father got transferred to another city in the year 2011, due to which we had called the company and gotten the broadband connection disconnected, which was done immediately by them. However, they did not come to our house on time to collect the broadband modem from us, due to which we left it with our next door neighbour and informed the same to the concerned personnel via their call center.
However, now 7 years after the connection was disconnected, my father has received a legal notice from an advocate deepak chaudhari from email id ([protected]@vmsgroup.in), who claims to be the legal representative of the company and who is claiming that my father has a due payment of inr 1179, which has to be paid within 3 days of receiving the letter.
The notice also says that if we have any doubts regarding this, we should contact a mr. Rishikesh bhale (Mob. No [protected]) or email him at (Mail id: rishikesh. [protected]@tatatel.co.in).
The entire legal notice is based on wrong information, because it claims that we took tata docomo broadband connection in the year 2016 from our address in nagpur. However, my parents have not lived in nagpur since the year 2011, which was when my father got transferred to a new city.
I am posting this complaint here because i believe this legal notice to be a fraudulent one, as it is based on incorrect information and is an attempt either by advocate deepak chaudhari or tata docomo to make some easy money.
I hope tata docomo resolves this issue and sees to it that their customer's information is not being stolen by unscrupulous persons hoping to make a pay day by entrapping their past customers. Mails like these are an offence against tata docomo as well, since they are ruining your reputation and goodwill.