double billing

Rain is running some sort of of **** or what i do not know, I have the unlimited 4G SIM card for internet on the 25 march they debited 479 in my account then i went on the app to change the billing date from 25 to 1st of every month. then boom come 1st of April they debit again another 479. i loged a ticket and no one is responding , i call support centre once they here my complain they consultant just let the line go mute. mind you the very same thing happened to my friend they they make debit and never want to refund.