Termite infestation

I used local anti termite , which repel termite before constructing home , but after 5 years the wall foundation outside home is clearly infected and termites trying to get into home , i contacted pest controller and he said this time we have to drill and use agenda product name in pakistan (bayer ) international product name (termidor) which do not repel or kill at contact but later when termites with that chemical enter colony , this chemical kills all colony , naturally its expensive , but now the plot next to me is about to construct and owner of that land said , i will use agenda in all bunyads , will it also decrease termite in my walls too or do i need to done for my home separately , i asked this because agenda do not repel but spread with termite in their colony and kills all this little monsters , which mean my bunyad of homes safe too ???

.

.

.

.

Can anyone suggest which one is the best anti termite product / company in Islamabad? I want to use it after laying foundation.