You’re engineers are brilliant, your office staff don’t care, you don’t care as a company, considering you’re charges you should at the very least have joiners who can box in the pipes that run along the ceiling of the internal wall.most other companies do.You can’t do this ,Not good enough.Don’t ask for payments at the weekend when office staff are not there.Customers are obviously going to pay as they’ve already given you part of the payment.DONOT offer payment online as the customer could be scammed.Ou need to add more services eg joiners for the prices you charge?