Saving account in minus bcoz of being debited twice

I am soo disappointed with Capitec for secondtime now And was asking myself why am I still banking with such unreliable bank...

I have a credit card with Capitec so my debit order always goes on the 15th Of each month for the past 3 years I have this credit card soo now this month as I got paid on the 14 thinking that my debut order for the credit card will go on the 15 and it did not debit and then on the 17th I got an sms saying my credit card is going on arrears soo now I panicked and transferred the money to the credit card to avoid it being on arrears.

Later the same day the debit went through meaning I was debited twice and now I didn’t have money at all on my savings account.

I used the money on the credit card since my savings account did not have money as I got debited twice.. When I go to the branch I was told that my account is on a minus the reason being I should have not had used the money on the credit card hence my account is on arrears....

I am sooo angry bcoz I was trying to save my credit card not to be in errers soo now my savings is on minus with a lot of money