They call non stop and harrass people

At this point they are harassing me they call 10 times in an hour and I can't keep track to block all their numbers because Trucaller always shows that it's them. I don't even know what they want from me because Ive paid up and they never resond to my emails .When I answer they throw the phone in my ear it's been a year going through it I'm gonna change number because of MBD..