Advice - Termite Inspection - Spraying

Just wondering if anyone can give me any advice on what to do about discovering Termites in the back yard?
Six months ago I put up a Permapine Trellis at teh back of the yard but I used Oregon Posts, I coated the posts in Copper Napthanate and painted them with Acrylic paint then cemented them into the ground. I noticed last night the Trellis leaning over and upon closer inspection discovered that Termites were eating into the base of the posts.
The trellis fell over easilly and I removed the permapine Trellis which was fine and left the posts in a pile in the back of the yard next to the cement bases.
I rang through to a pest control firm and this is what I am having some concern over, They didnt appear to worried about the Termites being in the post and said that its normal for Termites to live in the ground, all they wanted to know was how close it was to the house which is not that close because its at the back fence.
They are sending the bloke out on Tuesday to do an inspection and I am to be given a quote for having the house done, one of my workmates says to expect the quote to be $1000 and that the material that they use is rubbish and it has to be re-done every five years.
Anyway just hoping that someone might have had the same problem and can advise me of what they did to rectify it, if there is no Termite Activity near the house, do you feel the treatment is value for money anyway? Should I be getting the old posts and cemented holes sprayed to kill the existing termites?
Six months ago I put up a Permapine Trellis at teh back of the yard but I used Oregon Posts, I coated the posts in Copper Napthanate and painted them with Acrylic paint then cemented them into the ground. I noticed last night the Trellis leaning over and upon closer inspection discovered that Termites were eating into the base of the posts.
The trellis fell over easilly and I removed the permapine Trellis which was fine and left the posts in a pile in the back of the yard next to the cement bases.
I rang through to a pest control firm and this is what I am having some concern over, They didnt appear to worried about the Termites being in the post and said that its normal for Termites to live in the ground, all they wanted to know was how close it was to the house which is not that close because its at the back fence.
They are sending the bloke out on Tuesday to do an inspection and I am to be given a quote for having the house done, one of my workmates says to expect the quote to be $1000 and that the material that they use is rubbish and it has to be re-done every five years.
Anyway just hoping that someone might have had the same problem and can advise me of what they did to rectify it, if there is no Termite Activity near the house, do you feel the treatment is value for money anyway? Should I be getting the old posts and cemented holes sprayed to kill the existing termites?