Upstox — They are sending me annoying emails

I've opened a upstox account by mistake last year and i didn't done any trading or anything in that account.
So now i am worried that, they will charge me any money because I've accidentally opened that account and while googling i saw that they will charge me annual maintenance charges just for opening the account.
It was just a mistake that i had opened that account and i don't have anything to do with it and now i am afraid one day they will charge money one me and take money from my bank account.
Please help me