This company is trying to loot my hard earned money, they have sent me a final notice to renew my tv license, usually they send me an invoice detailing the amount and and their banking details but this year they decided otherwise only to threaten me with

This company is trying to loot my hard earned money, they have sent me a final notice to renew my tv license, usually they send me an invoice detailing the amount and and their banking details but this year they decided otherwise only to threaten me with a final warning and their lawyers aswell, they also claim to have added 2 months penalties yet when I make calculations it is way more than that, they failed to provide me with proof of the initial invoice as they claim they sent it to me on the 25th of August. How am I supposed to pay for a TV license without the invoice detailing the exact amount. And why send me a final when was the 1st warning sent?