I contacted Teamviewer to cancel my contract with the correct notice.
Seven months later I received a letter saying I have 7 days to pay a final invoice before debt recovery. The letter was received 2 weeks after the 7 day notice- didnt even pay the correct postage!
Immediately contacted Teamviewer support to explain the situation.
I was told previous letters had been sent(never received) and previous emails sent ( email address had been out of use for a year!)
Arrogant, dishonest and disorganised!