Keep calling

I don't know where these people get hold of our details but the phone calls are very annoying, I told numerous consultants to remove my name from their data base and GUESS what...... They still keep calling Incident: 13/02/2018 @ 14H25 They c all, I tell the consultant to stop calling and to remove my number, @ 15H24 they called and again 14/02/2018 @ 07H53!!!!! What part of stop calling dont you understand??????????????????????????????????????????????????????????????? REMOVE MY NUMBER FROM YOUR DATABASE