Very confused

I app**** for Mobicred last year in May, first I was told as I am self-employed I don't fit the criteria, then they approve my application without informing me. I have never used the account, So today I wanted to use my Mobicred, only to be told they have to reset my account. And all of a sudden once again I don't fit their criteria. Nothing has changed in my situation. Salary is a bit more, staying longer at the present address, working longer at present company?? So why now have they changed my application when they have approved it, given me a limit and account number. This is a company that I would tell people to be very careful of before applying for an account