Meron na ba nagpa-repair ng multipoint water heater sa inyo?

Ayaw na uminit ng water heater namin. Out of warranty na so may service charge of 350 pesos i called for the service. Sabi ng technician, kailangan daw palitan 'magnetic bullet' which cost 780 pesos. Tapos sira na rin daw yong relay, which cost 1350 pesos. All in all, almost 2500 ang cost of service and parts. Brand pala is JETT, and they have home service so sila default na tinawagan ko. Tama lang kaya ang charge na to? Or would you suggest any other reputable service centers na may home service din?