One of the reasons you're getting so many calls is that you keep picking up! Once you answer the phone, the scammer or telemarketer knows that your phone number has a person on the other end of it. They flag your number and then everyone else they're working with knows they can call you. So step one is to stop picking up. Then, you can use apps, call blocking, or do not disturb mode to keep them from reaching you in the first place.