I have a few questions like did you take this job in a hurry? Before offering you a job, the job profile, and designation, etc should be known to you. Being a B.Tech degree holder that too in a job, you should have denied for this.
Is there anyone else in your family who can take this job. As per my knowledge, this job was offered to you against your father's job, and it can be accepted by any of his sons or unmarried daughters with appropriate qualifications. So, you can think about that if you have siblings.
In the current situation, leaving this job immediately will not be a wise decision. If you are willing to leave this job, try for IT jobs and once you crack any interview, you can resign here. It is because, in the private sector, there is no job guarantee and in the government sector, once you leave a job, it is very difficult to get it back.
So, you have to plan accordingly. You may contact your previous employer and can ask for a favor. The reason behind this, they are aware of your work performance and can take yu back with the same terms.
Another option is to be in the same job and look for higher designations. In government jobs, they have various internal exams and you can get higher designations after qualifying those examinations. There is less competition in these kinds of exams as they are internal only and as you are technically qualified and experienced, you should try. Government jobs have different benefits and pension is the best among those benefits.
So, now, think and discuss with your family and then go further.
Living & Learning- simultaneous processes!