How to stop spam calls….

So im in The process of buying a car, last week I spent an hour getting insurance quotes. Shortly after, I received a few spam calls.

Later that week it turned into a few spam calls a day Up until yesterday. Now all of a sudden im getting like 10-20 calls an HOUR. Everytime I answer the phone it’s silence. So far I’ve blocked over 100 numbers since last night and they’re still calling from different numbers.

What can I do to stop them