I was listening to a guy called Jonathan on a Zoom call describing how he helped a sign writing company massively improve their credit control.
From memory he reduced the 150 day debts by 35% and 90 day debt by over 50% within a few weeks.
I thought of you in case you need someone like this to give you a boost? He either does the credit control for you, or, helps set up better systems to get on top of it.
Let me know if you want me to put him in touch to chat through what he can do to get you paid!