Lack of communication and effectiveness

I app**** for a personal loan for house reasons. Went through the process, I got approved the 25th of November 2021. Did everything asked of me and provided everything asked of me. I call from Monday every day to find out what is happening to the loan. I get told it's complete and it's approved. Last night 2nd December I was told my application fell through after being approved. Communication after last week's approval was horrible. I'm unsure why an approval was given just to inform me, there is a decline at the end, this created false hope and serious misinterpretation of how the process works and what was told to me over the phone. This also now messes with my chances with a bond with my wife where my credit record has a mark on now. I would have never gone through such a process if I knew it wasn't viable. Why was I approved in the first place. I even sent an email to the complaints department. Wouldn't recommend going this route, it leads to disappointment as you left to wonder what approval means and how the process is easy when you get pushed around instead I could of had other plans.