Tata Motors — Service center people not fixing my car

I Janardhan Sapavat, bought a Tata motors altroz dca vehicle in 2022, so far it is running good but for some reasons it is showing some error called TPMS SYSTEM FAULT so I have towed my vehicle to the nearest service center 3 times but they are very ignorantly saying it is running fine there is no issues, but as soon as they deliver the vehicle the same issue is getting repeated, so my concern is I have purchased as they offered extended warranty and it is going to be expired in September. After that how could I pay from my pocket completely rather they could fix the issue.
My vehicle number is TS04FG7402.
Khammam district registration.
Showroom details are: VENKATARAMANA TATA MOTORS MAMATA ROAD, Khammam.