Poor system security resulting in bad credit score - NOT FAIR

I have been a customer with RCS for many years with no issues.

Recently I received a message stating that my account was hacked and for obvious reasons RCS had to make changes to the account without informing me.

At the end of August, there was no debit order for the instalment due. I assumed this was due to the issues with the account. I then receive a letter stating that the debit order failed, THERE WAS NO DEBIT ORDER, and that a double debit will be done at the end of the month. I do not agree with this solution.

Why must I be double debited for a problem that was the fault of RCS?

Why must I now have a poor credit score for a missed payment when it is no fault of mine? It is your system fault, not mine. If you check my history you will note that I have never defaulted in all my years as a customer.