Is it possible to take an extra payment for non-compliance with the deadline?

Question

Freelance

Everything would be very simple if I was the customer, and the performer did not meet the deadlines. BUT! It's all the other way around ...

Service: turnkey website (responsive, wordpress, 4 pages)
Deadline: 18 (!) February.
Agreement: not concluded. (It's a pity, I cursed myself a hundred times already)
Budget: 15,000 rubles (at the moment 10,000 have been paid)
Stage: transfer to the customer's hosting
Dialogue:
Me - me;
Z - Customer. ( although, her words are still not there :D )

Me: I'm ready to transfer; I'm waiting for payment all the same:
42********89.
Me: Name , good evening!
How much to expect payment?
Me: Name, good afternoon!
If I understand correctly, you didn't pay anything yesterday, right?
If today, approximately what time? :)
Me: Name, when will we finish the site?
I need to start my next project.

The customer reads my messages, but does not respond.
The above dialogue has been going on for the 4th day, I write every day, but in response to silence.
Actually, the question is:
When the customer appears and wants to continue working on the site, is it fair to charge an additional fee for waiting? If yes, how much?
And how do they usually react to it?

Answer 1

Do the following projects, and when he decides to pay, tell him that you will transfer when you have free time. Let him wait then.

Answer 2

Absurd! On what basis?

Answer 3

You didn't do any extra work, what should I pay you for? I could just be busy, get sick, just fuck.
You can continue to work, whatever is stopping you.

Answer 4

Now I will charge you extra money for doing business, not programming. Look what a neo-businessman you are.
Politely ask what kind of business, and calibrate - lying or not. If you're lying, send it. If there is trouble at home, help. That's how you have to work. And not in a Jewish way - save more on your employees in order to give more to lazy customers.

Answer 5

may not pay at all.

Answer 6

When you pay extra, you will transfer as far as possible.