As per your instructions we followed the oriental taxi case. We had sent technician to un install and then re install devices. If the devices are un install and install the same time we have charged only one time. But if technician had to un install one day and re install another day then we have to charge it. We had agreed to it before doing this work. We had asked you to get the confirmation from customer so that there is no issue later. On your confirmation we had done the un install and re install for the customer.