Been having to juggle between cashapp borrow and free overdraft coverage because this guy has owed me 65 bucks for 3 weeks

I work at an amusement park and right now I only get one day a week, I started picking up extra shifts through an app but it wasn't until last Thursday that my available shifts stopped being limited (it's still only 25 hours for m-f)

It's only really mildly infuriating because I had made the decision to cash app borrow $100 for call of duty even though he still hasn't payed me as I knew I could pay it off myself even without the guy paying me back, but I want to upgrade my phone now and just want this guy to pay me back already so I can get my finances straight and order the dang phone and start worrying about rent again.

TL;DR: buying stuff off of future income is tight