get alot of calls in two weeks

In may , i got  the scam for 1300 euro form apple card, after that i get another mail same . i blocked, 
My number phone is business number  so i can't change number but i recived  a few call (  speak english directly ) asking me sit near computure and get refund form somehthing  here the number called me for refund : + 31 and another :  +31  / some way i get the felling after get scam money from me , they not me on there system. Supper hard now becuase i don't know new customer callign or scam anymore , I worry they record my voice .. or try to connect me again, ofcourse  only have to block a number but there are many  how can i block at all ?