Nexa — Gearshift problem

It has been almost more than 2 yrs.that i have been facing the 3rd gear problem.when i move from 2nd to 3rd sometimes it just becomes so hard like stuck and then u have to get back to the 2nd gear, also the other problem is again when i push from 2nd to 3rd gear sometimes it just gets freed up and the vehicle goes in like it will stop as has no power so u have to again shift to 2nd gear.
Recently for this issue finaly went to company and they replaced the gear assembly which worked for me for 20 days ...and then today came across the same problem.

So having no.option again went to the company where the concerned person has a test ride to find if there is any problem and ya now he says ur gears are working properly having a ride of 1 kms...ohh cmon 😯

its me who comes.across the problem so ur job is to seriously give a thought to what i am facing... and to overcome that.