RBL Bank — regarding limit set up fee and multiple gst charges

I got rbl credit card through money tap app for lain of 50000, my first month bill is more than i expected, they considered the limit set up fee for wat it has been charged, i thought only processing fees would be charged as intimated in money tap app, they why they charged limit set up fee and multiple times gst have been added to my first month bill, as a middle class people like me suffer alot for this, wat is the solution for that 🙁