Airtel — unwanted channel added

Address:

Indore, Madhya Pradesh, 452010

Dear sir,
Today received a spam call from air tel dth [protected] he is insisting
To upgrade movie package but i refused as no use for me.
After few minutes later they added some channel @rs.65 /
I tried to contact many times but not success & don't know how many people they cheat such this way.
There is no option for channel remove/downgrade on air tel dth portal.
I can share customer number, contact detail if require.
Date of incident : 03.04.2019
Regards
Surendra jain