Propelld — EMI auto Debit date

I took a loan from propelld for my analytical business analytics course. My EMI cycle/auto debit date according to them came out to be 3rd/4th of every month. I requested to change the EMI auto debit date as my salary gets credited after 7th/8th of every month. but i was given a reply that "THERE IS NO FLEXIBILITY FOR THAT". In this case my each EMI will be bounced and i will have to pay penalty charges to bank and propelld as well. Loan is taken for facilitating some thing not for increasing stress in financial condition.

I need to change my emi auto debit date to avoid penalty charges.