Unless you are 100% sure who you are talking to, it is best not to say anything. Never push any buttons. Simply hang up. If it continues, use your call-block features and report the number, date, time, etc.
I got a call from this number and it said to press a digit to be removed from list... and I automatically did :/. I regret doing that... Does anyone know how we can report this number or what could happen since i pressed a number?