Poor customer service

I took a loan with capfin on the 15th of September for a small amount. I updated my financial details as some details were incorrect, my loan was approved and paid out. On Monday the 18th of September I decided to take the rest of the loan amount offered of 8600 to settle the rest of the accounts. When I app**** I pressed confirm assuming that the financial details that was updated on Friday remained on the account however the financial details went back to the old incorrect value and my application was declined. This was an error on my part as I did not double check the amounts as I assumed it was updated as of Friday. I tried to call to rectify this however they stated that is already done and they cannot undo it. I am a good payer and my account has never been in arrears nor have I paid short or missed a payment Surely someone is able to assist to reset the application but they are just unwilling to do so