Disappointed with the service at fnb home loans

Two months ago I app**** for a home loan at FNB. It was approved 100% based on the condition that I sell my property. Then I managed to sell my property after two weeks but I lost that property then I app**** for another property but this time I was only approved 50% of the loan because they told me that a mistake was done on the first approval on the first application by their consultants. Then after few days I app**** for a home loan again on a different property which the amount is exactly the amount that they told me I qualify for and then the results come back after two days now they say I only qualify for 50% of that property. I'm sooo disappointed because nothing has changed on my credit score and I even sold my house and dont have a place to stay now.