I too had a horrible experience with Honda Activa services. Their senior technicians are even worse than local repair workers. They never listen to your complain and they will just start to do whatever little they know about the vehicle.
And with battery problem they simply say its not theirs and the customer himself should go to company for battery warranty claim.
Honda service genuinely sucks. Please do write into the honda 2 wheelers website on feedback section.They should know what service they are providing to the customers.