A spokesperson for NatWest has said that they have solved their earlier computer glitches which affected customers' accounts on Thursday.
Earlier, the bank revealed that some customers "may be having issues with online banking and their debit cards."
Many customers who have experienced problems took to Twitter to talk about them.
This is the second time in as many months that NatWest customers have suffered from banking problems.
It said the problem was caused by "human error" and meant some customers who used their Visa cards on Tuesday had duplicate payments also taken out on Wednesday.
Nationwide told ITV News' Consumer Editor, Chris Choi that 704,426 accounts had been affected.
As some customers discovered their accounts had been debited twice, they voiced their anger: