Airtel — Calling charges change without any information

Address:

Haridwar, Uttarakhand

Dear sir, without any information airtel change my plan from 1 paisa per second to 2 paisa per second.while my sim is 6-7 year old and starting with this plan 1 paisa per second.now please rectify the matter, if you could not then tell me to port in idea connection with this number.
Your vip customer. .
Email address is avneeshsh.[protected]@gmail.com