Dissapointment spray paint *******

What started out as a very good experience was quickly overshadowed when i received an invoice for R 3900 after the installers used the remaining paint left in 6 old spray cans to spray the flue . This "spray service" using left over spray from other clients was equivalent to 10% of the entire cost to install the fireplace .ABSOLUTE ABSOLUTE ******* . i have had no further correspondence and I am still waiting on my refund that is owed.