Not sure what country you are in, but in France if the other party is not going forward with it you use a "commissaire de justice", which is a regulated profession with special powers and will be able to seize money straight from the other party bank account (while taking a fee and a % for himself for his services). It works whether the other party is a legal or a moral person, they're also allowed to get inside their home or office and seize physical things, or even put a place for sale. See [1].

You need a "titre executoire", which a judgment in court is. If on the other hand you have a simple normal everyday contract and the customer isn't paying for it, you can ask the court for a titre executoire, where the other party can argue and the judge can check whether it was a real contract / you delivered / ... and if yes will give an order to pay -- it takes between 2 weeks and 3 months in my experience, if you get the titre and the other party still doesn't pay then you can use the commissaire de justice de seize from their account.

If your contract is for a sum below 5000 you don't need to involve the court, only to have tried amical resolution before, and then the unpaid contractual debt act as a titre executoire by itself, that the commissaire can act on (though as that point the other party is allowed to involve a judge to protect themselves if needed or wanted).

They usually send a notice to banks and banks have to return what accounts they own for said person, to allow the proportional seizure.

Now this has limits of course, most importantly if the other party is insolvent, or if the commissaire cannot find their assets or they don't have any, etc ... But for a company like Orange, it's a non issue.

This will be paid, one way or the other.

[1] https://www.service-public.fr/particuliers/vosdroits/F922