In my opinion the author should continue in the company mentioned by him and should never think about leaving the same until and unless a better option becomes available.
While continuing in the job, the author may complete AMIE which can be completed without leaving the job. AMIE is recognised as equivalent to B.Tech. or B.E. like engineering degrees. The author may study the website of the Institution of Engineers for finding out the full details about completing the AMIE program.
Apparently, it is not true that after doing AMIE, one cannot get teaching jobs. However the most important point for the author is to continue in the present job, despite hardships, if any, and don't think about leaving the same on one pretext or the other.