Difficulties in gearshift - Toyota Yaris 2009

Hello,

I don't know if there is already an open theme or not, but I need help because I find myself desperate.

Approximately 2 years ago, after a relatively short trip of 30 km, I could no longer change marches in the car.

I got home and left the car at the concessionaire that was from the concessionaire where my dad bought the car, because I was still under warranty. In short, they did not accept the car since they said that the warranty was only for the engine. As I was already in the workshop, I decided to leave the car there and obtained a budget of about € 750 for the clutch kit.
Unfortunately, I had to pay this amount, but the changes still seemed to have some difficulties. I returned to the garage several times, they repaired the car again, but it looked equally again.

After this time, now out of partial guarantee, I cannot put first when, for example, I stop at a traffic light or uphill where you should always use first. I can't reduce from 5th to 4th. Everything else works well.

If I turn off the car, I can put all the changes without problems.

When reading the various forums on the subject, there are many solutions that present me:
- Valvulina;
- Gear reels;
- clutch disc;
- gearbox;
- etc.

I would like to know your opinion, because I am desperate and I do not want, nor can I spend another € 750.