Can any car service center fix a Toyota CVT gearbox?

Hi, I am looking for a reliable car service centre that can fix the automatic cvt gearbox of my Toyota Yaris cvt. Toyota is asking for a complete gearbox replacement which will cost 3-4L. The car has already completed 1.8 lakh kilometres, spending 3-4L again for a new gearbox doesn't feel worth it to me, I know the Toyota cars are immortal but the Yaris wasn't handled well. Let me know if you know someone or you know someone who knows someone.