Should I demand payment for the work that is done to satisfaction

I am a new franchise owner. We remodel bathrooms, mainly showers. I have a customer that is dissatisfied with his shower door. We have replaced the door twice and he is still dissatisfied and refusing to pay for the job. We installed flooring, built a shower and installed an upgraded door, followed by a replacement door of the same brand, followed by another door chosen by the customer. The final door needed adjustment and a custom shower door company was sent out to assess and adjust, as the customer was still dissatisfied. The customer now wants a custom shower door installed by the company we sent to assess and adjust the door. That door cannot be installed until January 7th. We completed the initial work on the bathroom and invoiced on 11-11-21 and have been attempting to satisfy this door issue. The customer points the shower head directly at the corner of the shower door where the hinges are when he showers, I guess it is preference however the first 2 doors were frameless and that is an impossible problem to fix given his showering technique so he requested a framed door and we are still not getting paid. The cost of the custom build is $700. Are we allowed legal to demand payment for the rest of the project?