nissan nv350 repair

i towed my vehicle there.Problem with it keys computer and fuse box was ******.they phoned me back and said i must take my vehicle back and assemble because they don't work on striped vehicles.so i drove there and spoke to workshop manager and ask him that what must i assemble ? :) He said if he does it he will charge me R2000 .I ask him what is he gonna assemble.He said everything Which is only front seat i assume and he has to strip it anyway to get to the computer box area.I said my driver that he does not want us there and he is making excuses at front of him.he was sort of agreed. My thinking was including parts (computer box key set and fuse box i will pay just about R40.000 .And with this rude workshop manager i towed away to another place. They supposed to be Agent of the Nissan.They suppose to check the matter and quote accordingly and let customer to know.Not assume that we can not pay the bills and push us to take away our vehicle.Shame for the owners that they have to work with unprofessional and useless people like that.I am expecting to pay R40k and you think you can scare me with R2000 assembling fee which is front seat that you have strip it again anyway :) Looks like it is just a joke but it was not funny