Give the money back


I’m a freelancer. A client made a mistake and paid me twice.
I know I have to give the money back, but part of me doesn’t want to.
This client took 10 months to pay me. I had to call them several times, they didn’t call me back, I had to write emails… I know I see it like I was the victim of their bad behavior because I had to put a lot of effort into it. So now I feel resentful and I want to keep this money. It’s like “I deserve it after all” and “They are so stupid and disorganized. They deserve to lose this money if they are so stupid.”
Also I think: “I don’t have enough money”, “I’m not paid well”, “my situation is a bit precarious.” So I think: “I want more money. Let’s just pretend this money is a gift from the universe…”
But of course I know this is dishonest. I want to be honest and be able to create money because of my mindset, because it would mean I would be able to create more and more. Not because a client made a mistake.

Unintentional Model
C: x euros on my bank account from this client
T: It took me so much time and effort for them to pay me
F: resentful
A: don’t tell anything, keep the money
R: I lose a lot of mental time and energy to think about this situation

C: x euros on my bank account from this client
T: I don’t have enough money
F: tight
A: keep this money, don’t give it back, don’t think how I could create more money
R: I’m not the honest and rich professional I want to be

Intentional Model
C: x euros on my bank account from this client
T: I want to be an example of organisation and possibility
F: invested
A: give the money back, congratulate myself
R: I enjoy being super organized and honest

C: x euros on my bank account from this client
T: I can create the money I want
F: empowered
A: give the money back, take the money course, take massive action, test my business idea, adjust, learn from experience
R: I become the honest and wealthy professional I want to be

The thing is, right now, I don’t believe yet my current project can create more money for me and that I could become wealthier. Do I  just have to keep practicing this thought “I can create the money I want?”