Format Date and Time

I have Excel file with date column ('Column1') format as:  dd/mm/yy  

and time column ('Column2') format as: hh/mm.

I need to use these columns in a chart with a new calculated datetime column ('Column3') format as dd/mm/yy, hh/mm.  

( Column3 = (Table ['Column1'] + Table ['Column2'] ).

My problem: whatever i'm trying to do i can't get the reuierd format - dd/mm/yy

The format that i get is mm/dd/yy. Even when i'm getting the right format in the date column ('Column1'),

I can't get it right in the new calculated column ('Column3').

I tried to change the following:

Date format in the Excel file (Text, Date, Custom format);

Data Type in Power BI, both text and date;

Region (Location) settings in my computer;

Regional settings in Power BI (File - Options - Current file - Regional Settings);

Check and uncheck Time Intelligence Auto Date/time (File - Options - Current file - Data Load);

I also tried to split the date column, arrange the new columns in the desired format and merge again.

Nothing works.

My question: is there a solution through DAX or Power Query to set the desired date format regardless of the

the regional settings of the source file/computer or the Power BI Locale?

Thanks