Tata Motors — Fuel pump issue in my Car

Address:

Bhopal

I purchased my Tata Tigor in 2018, and from last year its been having this issue where the accelerator stops responding during drives and it stops.
along with it the car also fails to pick up after restarting and we have to wait for an hour for it cool down and start again.
This especially happens during summer, and have also shown it to service twice but hasn't resolved my issue.
They say it's fuel pump issue but the replacement is costly at almost `12K and being already serviced twice on same complaints hasn't done anything.