New application miss communication

I did a application online yesterday and got communication that it was approved and that I should wait for a call center agent to call me. I called this morning and the agent told me that I am approved by condition meaning that they can give me a cheaper phone and not the one that I want. I asked why and he said it's because of my credit check. I then messaged a agent later on in the day using the chat platform and the agent says my credit score is too low. Bare in mind that my credit score is 622 and I have disposable income. If this was the case they should have never told me that my application was approved, I even received a sms confirming it was approved. Very disappointing.