Hathway — Provide wrong information via phone and took amount finally activated wrong plan

Address:

Hyderabad

I am a customer of hathway, retain plan they told some offers are there.

08/Sep/2022 I renewal my account with 530, from the MSG send by backend/offers team and paid via Gpay.
By that time she told/promised me that for the amount of 530, I will get 75 Mbps speed for 30 days. But now 50mbps plan activated.

I when I try to reach customer care, they are saying we are not responsible for as backend team promised you...

who will be backend/offers team and how I need to contact to them...

I have registered a complete on this, no one contacted me and ticket got closed today I registered another ticket too.

I am facing very bad experience with the service providing.

I have audio clips how rode they are talking with customer.