Ok but intensely draining - Customer Service Advisor Firstsource Solutions Employee Review

Job was advertised to me as correspondence, where it was only emails with a few calls. Accepted the job, and in training found out that it was a Customer Service Advisor job in a call centre, and had to call every customer no matter what. It wasnt what I applied for and found my anxiety increasing each day at the job, and I had to get a month off from.my doctors on the grounds of mental health due to the workload given. KPIs and personal targets were sometimes ridiculous Not enough help or support once you pass training and gradbay. Finishing at 8pm; I travel by public transport and my bus stops running from work back to my home at 6. This meant I had to walk far away to another bus stop in the dark, and at some points I wouldn't get home until half 10/11 at night. I never bothered to bring in food for dinner purely because you dont get enough time to eat, and you couldn't bring hot food to your desk. I bought this up at a HR meeting and nothing was done about it