Early deduction of debit orders without my permission

Intellicell deduct my debit orders on the 15th of this month of December 2020 just 15 minutes after money was transfer in my bank accounts

I did phone them and inform them that my salary date is the 23 of December 2020 with they inform me that they will reverse the debit orders in 24 to 48 hours.

What is so unfair in 15 minutes m poo ney was been taken out of my bank account with out consulting me but now I must wait 24 to 48 for my money to be put back as quick as they had take it out why can't they not put it back. Immediately after they were making aware of the early deduction without my permisaion