Make a call/ make the call

What is the difference between make a call, make the call?

Let’s some sentence-
Why you are not receiving her call? She called me, now you make the call for her or make a call for her.

Please clear me.
Thank you

You have other problems, Smnfrmd:

A: Jan called you, but you weren’t here.
B: Why didn’t you take her call? She called me, so now please call her back.

As for a/the: use ‘the’ for specific or previously mentioned things:

A: Can I use your phone? I want to make a call.
B: Oh, if you’re busy, I can make the call for you.

Thank you Mr. Micawber
you are right I have confusion between a, the.