Zero professionalism. Employees are treated as machines and not as humans.
You can't grow beyond agent or TL level.
They will set unattainable targets so incentives are rare. But they will add that as variable pay so that your CTC looks beefy.
There is nothing much to learn except in the first one or two months.
The managers will swear at employees on the floor without consideration of their feelings.
The work timings will change randomly and you won't have a say in it.
They will say first Saturdays are off but you can't plan anything based on that as that may change any month and you will be threatened with LOP.
You will be expected to extend whenever they want you to with no overtime pay.
You can never settle down with the process because it will keep changing every month.
HR is basically useless.
They will play good-cop-bad-cop with your employment.
You will feel like everyone hates you in the company and the customers will, too.
You can't even think of a work-life balance as they will squeeze the life out of you and you will only be working like a rat in a wheel chasing an impossible treat.
Every employee in the company is depressed at some level and the company doesn't care about improving the conditions for them.
You can go there to make some money if you don't have anything else to do, but if you wish to have a career, please don't waste your time and energy here.