I just found out the hard way that if you no longer wish to renew your license, after the one year has expired, you have to notify them 28 days in advance.
They never wrote anything to let me know that the year was about to expire, I was only presented with an invoice for me to pay.
Upon refusal of payment, I started receiving threatening emails from Credit Reform, their Debt Collector company, that I am forced to pay, otherwise legal actions will be pursued against me.
I have not ever dealt with any other business, with such practices, beware and stay away from this company!
Let us also not forget how they used to sell perpetual, lifetime licenses to people, only to then start asking them for paying a subscription fee.
A shady company from every perspective!
The good thing is that there are many alternatives out there!
An expensive lesson learned, always make your due diligence and read up on a company practices, before you engage in making a contract with them.
Posts regarding TeamViewer's practices are all over the internet since 2016, and they do what they do, because "they can", disregarding any customer satisfaction.