Our server got UDP ddos attack 2 days ago we talked to our VPS host (which hosts the server since over a year)

when we told them we only host TeamSpeak 3 server on that VPS thy said:

Teamspeak can be used for outgoing DDoS attacks - This was likely an revenge attack.
Can you remove the TS3 server? As per our ToS we'd like to ask for it as it *will* cause issues again - It's simply a coding problem on their side.
its the first time i hear about something like this so is it true by any chance??
we never attacked anyone and never got any abuse complains with our IP/TeamSpeak involved