I once got a angry email from my ISP that i have ports open i shouldn't have. If they would be used for DDoS amplification they'd cut my connection. And if I c

I once got a angry email from my ISP that i have ports open i shouldn't have. If they would be used for DDoS amplification they'd cut my connection. And if I couldn't fix it or had no clue what any of these terms meant I should pay somebody to fix it for me. (No referrals)