Removal of car-tracker devices

Ever since I installed car tracker in my vehicle it has given me electrical problems. The tracker and camera installed are finishing my Battery 🪫 idk how but the technician 🧑🔧 that installed those things there he did nonesense now it’s eating my pocket. I’ve been calling them to come and remove their belongings on my car but their service is very very poor. The car is at the dealership Toyota but still they fail to go there and take their stuff. These people bore me to the core and I’ll never recommend them to anyone else in the future! Sies