Grand i10 clutch and gearbox issue

Hi,

I Have purchased Grand i10 in 2014 but it was 2013 manufacture car and just in few hundreds kms I faced a wierd issue with the car clutch and gear box. All of sudden the gear box  got stuck in middle of my drive and was not able to continue as in whatever speed I am driving it jus runs at 10kms/hr speed and it was a terrific experience.

Then the showroom said out of 100 vehicles they have 2-3 vehicles with same issue and they promised to sort it out.

They said they replaced some parts and returned my car but unfortunetly I was facing same issue reguarly and they told me to pull clutch and hold it and issue will be sorted.

So everytime I did same I continued my drive.

So now I droved 60k kms and issue has turned out to be worse and showroom says it is routine issue and i need to replace it with 12000 cost.

I wonder why should I pay this when I have the issue from dayone.

Can anyone help me what to do with this?