A borrower claims their bank altered their housing loan agreement to show an EMI due date of the 31st, despite the borrower's understanding and consistent payment on the 5th. This has led to the loan being reported as delayed to CIBIL, impacting the borrower's credit score and ability to secure a balance transfer. The borrower is considering a defamation case against the bank, while others suggest it may be a case of fraud or consumer deficiency, advising evidence-based action rather than a defamation suit.