You can find a call block app or see if your phone has one built in. My phone allows me to put numbers in a restricted phone list. I pull up the call and then tap on the three vertices dots to find that option.
Been getting repeated calls daily several x's a day all hrs never leave a message decided to answer this morn said hello several times an they hung up .. I gonna put word out not to answer I suggest blocking the no. With the way this world is give no info if they answer .. very suspicious be safe not sry