Check this site: https://voser.pro/
But read carefully, as I think they run teaspeak and or teaspeak & teamspeak.
Most of them are having ads so :/
Btw. I would sugest you maybe rather buying VPS, you got VPS with low as 1€/month, and you don't need to buy license since free license has 32 Slots.
So you would pay only 1€ nothing else, and have legit ts3 license, and stable Teamspeak.