Application declined with no clear reason

Please can I have a clear explanation as to why my RCP loan application was approved yesterday then today I am notified that it is declined. I went through the application process with a consultant and he confirmed that the application is approved. He also confirmed the amount and debit order. I also received an SMS confirming application was approved. I told the consultant I to contact me today to finalise. Today I am told credit has declined my application with no clear reason other than 'do not meet credit requirements'. Please can I have a clear reason why I was approved yesterday only to be told today that credit has declined it.