R906.30 for labour

I called the above mentioned company to install a pedestrian gate striker. Initially they tried to charge me R1134.30 to \1 x Service Call to check electric lock on the pedestrian 395.00<br> To supply and replace 1 x Striker lock on gate"600.00.\"" This is after i mentioned that i only required labour to fit the striker lock for the pedestrian gate. I had my own striker lock. The following invoice was \""changed\"" and then read \""1 x Service Call to check electric lock on the pedestrian gate 395.00 To install clients own lock on pedestrian gate 600.00."