They want to deport him from Australia; can he take money from their companies without their knowledge?

Dear Brothers & Sisters,
As-Salaamu-Alaikum wa Rahmatullahi wa Barakatuh. (May Allah's Peace, Mercy and Blessings be upon all of you)
One of our brothers/sisters has asked this question:
I am living in australia، came here as student، been here for almost 4 years، my family also came last year، i applied for wife's visa so she study and i work here، but they put objection on application and not giving visa، end of march they will reject application and we have to go back، i just wana ask that after giving them all the fees and everything for 4 years now they rejecting us and we have to leave for nothing? my question is i was using bank credit cards، if they asking us to leave then i wont b repaying money to them، if they not allowing us then i am not paying them، and also i got phone connections which i pay them monthly basis، so i wont be able to pay them as well، i know this will b not good for my future arrival here in non-muslim country، but if they allow me to stay then i pay them all، or pay them if ever they allow me to visit again? what u say about my situation.
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Check below answers in case you are looking for other related questions:
What matter is the intention - even if there is a slip of the tongue
Taking Money from Non-Muslims by Treacherous Means

Answer:
Praise be to Allaah.

What the Muslim must do is be a good example of trustworthiness, fulfilling covwnants and good attitude. The fact that Muslims had these qualities was a cause of many kuffaar entering Islam when they saw the beauties of Islam and the good attitude and conduct of its people. 

Treachery and betrayal are forbidden in Islam, whether that is with a Muslim or a kaafir. What the Muslim is required to do is to respect the covenant between him and the country where he is or to which he has travelled, even if it is a kaafir country. The fact that it is a kaafir country does not make it permissible to betray it and consume its wealth unlawfully.

So long as that country has granted safety to the Muslim who entered it, and it is giving him protection and protecting his wealth, then he is required to be honest towards that country, and it is not permissible for him to betray it or cheat it. 

Based on that, that country is within its rights to admit whomever it wants and refuse whomever it wants. If any Muslim enters that land, it is not permissible for him to deceive them or cheat them, whether that is done to the state itself or to its citizens, institutions or companies. He does not have the right to insist that they admit his family into their country or grant him permanent residency. 

Ibn Qudaamah (may Allah have mercy on him) said: 

As for betraying them, it is haraam, because they only granted him safety on condition that he refrain from betraying them and that he protect them from himself (i.e., harm caused by him). Even if that is not mentioned in so many words, it is implied and understood. End quote. 

Al-Haafiz Ibn Hajar (may Allah have mercy on him) said: 

It is not permissible to take the wealth of a kaafir, when they have trusted one, by dishonest means, because people may travel together on the basis of trust, and trusts must be rendered back to their people whether they are Muslims or kaafirs. End quote. 

Based on that, what you have to do is return to them the money that you took from them. 

See also the answer to questions no. 50716, 126378, 14367, 109351 

And Allah knows best.

Whatever written of Truth and benefit is only due to Allah's Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.
Your brother and well wisher in Islam

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