Unknown DM Visa links payments for FNB account

Lately I have been getting money taken from my account for DM Visa links for a couple of months for a few consecutive days in a month ,I don't know what this is for and when I try to dispute the transaction that causes a cancelation of my card which will cost me to get a new one. I'm already paying outrageous monthly fees . May I kindly get my money back and an explanation as to why I was not made aware about this and may I have my money refunded please?