When does the salary change after an internal position change?

I am a fresh graduate who has been a full-time intern with a company that only covers transportation for over a year while completing my studies. I graduated this May.

In March of this year, they offered me a full-time employment contract since I was now near completion of my degree.

They still kept me on the internship allowance (AED 1000) until I submit all documents for visa processing.

I have submitted all my documents for processing towards the end of May. My grace period after cancellation has also expired on the 25th of June.

They are still paying me the internship allowance. Now that the visa is pending on their side, shouldn't they be paying me the full salary?

I also think they should have paid me the full salary once I signed the contract regardless of the visa status since I was already working for them.

Please let me know whether I should push the company to pay my full salary since the time I signed the contract (March) or only since this month (visa pending on their side)?