Who knows how to get rid of calls from numbers like 8886290189/877-770-4157?

I received calls from those numbers at least 3 times everyday since last Nov. It is usually a recorded call saying it is Sallie Mae looking for Christopher due to some student loan things. I told them several times I was definitely not the guy and asked them to delete my name from the list. Apparantly and unfortunately,I was ignored.

I google those numbers and find they are so many people who are bothered by the same problem. I do not find any valueable suggestions for getting rid of them. But I really find a black joke about that

There are three certainties in my life: 

1. Death  2. Taxes  3. A call from this number EVERY DAY

So who can help me out of this?