207 Gearbox malfunction

I have the 2010 model 207 - 2 tronic vehicle, it was constantly giving gearbox malfunction, I was shifting a gear back and forth and working again. But the return of the holiday break gave the same error again on the road and stopped the vehicle. On the road I called for help, they connected it to the computer and they said there was a problem with the Clutch and they said the part should be changed.

The car worked again after a while, I continued the road and stayed 2 more times on the road, but after waiting for 15 minutes, the car runs but the danger of staying on the road continues at any moment.

I have not taken it to the authorized service yet, I talked to the phone, if the problem is related to the clutch, they may cost between 1500 TL and 4000 TL, although they are not clear.

Regarding this problem, I want to take it to the private service, not the authorized service, we all know that the authorized services are missing a little. Is there a good solid private service you know? If possible, on the Anatolian side of Istanbul?

Thanks in advance